No, plugging your Lightning to USB-C cable into a display with USB-C inputs would not allow the iPhone to send video to the display. The Lightning to HDMI adapter actually has a small computer (as in small enough to fit in a single chip) inside to do the HDMI conversion. Here's someone that tore one of those adapters apart: https://boingboing.net/2019/07/29/teardown-of-apples-lightning.html

If you were to connect your iPhone to most USB-C docks then it's not likely to do much but maybe charge your phone. Most USB-C docks rely on the connected host to provide a DisplayPort signal, and the dock has a chip in it (perhaps much like that Lightning dock) to provide the HDMI conversion. Maybe a dock like you describe exists, I just have my doubts.

The Lightning to USB-C cable I have, which is not from Apple, can only charge my iPhone and provide USB 2.0 data to and from my MacBook. I tried plugging in different USB-C devices and it doesn't appear to support attaching anything else.

This brings my own question to this answer and I wonder if an Apple Lightning to USB-C cable be able to do more. It’s advertised as a charging cable and not a high speed data cable so I wonder about USB 3.0 speeds to my MacBook Pro for things like being an internet hot spot, or move files back and forth.

I presume at some speed it would allow me to connect USB-C drive and transfer files.

I'm rather disappointed with the Lightning to USB-C cable I have. I was expecting far more than just a USB 2.0 cable. I was not expecting HDMI out of such a cable, just something more than 12 watts charging and faster USB data than 480 Mbps.

Answer from MacGuffin on Stack Exchange
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No, plugging your Lightning to USB-C cable into a display with USB-C inputs would not allow the iPhone to send video to the display. The Lightning to HDMI adapter actually has a small computer (as in small enough to fit in a single chip) inside to do the HDMI conversion. Here's someone that tore one of those adapters apart: https://boingboing.net/2019/07/29/teardown-of-apples-lightning.html

If you were to connect your iPhone to most USB-C docks then it's not likely to do much but maybe charge your phone. Most USB-C docks rely on the connected host to provide a DisplayPort signal, and the dock has a chip in it (perhaps much like that Lightning dock) to provide the HDMI conversion. Maybe a dock like you describe exists, I just have my doubts.

The Lightning to USB-C cable I have, which is not from Apple, can only charge my iPhone and provide USB 2.0 data to and from my MacBook. I tried plugging in different USB-C devices and it doesn't appear to support attaching anything else.

This brings my own question to this answer and I wonder if an Apple Lightning to USB-C cable be able to do more. It’s advertised as a charging cable and not a high speed data cable so I wonder about USB 3.0 speeds to my MacBook Pro for things like being an internet hot spot, or move files back and forth.

I presume at some speed it would allow me to connect USB-C drive and transfer files.

I'm rather disappointed with the Lightning to USB-C cable I have. I was expecting far more than just a USB 2.0 cable. I was not expecting HDMI out of such a cable, just something more than 12 watts charging and faster USB data than 480 Mbps.

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I think you can use the USB-C to USB Adapter which lets you connect iOS devices and many of your standard USB accessories to a USB-C or Thunderbolt 3 (USB-C) enabled Mac and other devices.

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Apple Support
support.apple.com › guide › iphone › charging-cable-ipheb425c7c4 › ios
Charging cable for iPhone - Apple Support
You can connect iPhone to a power outlet using a compatible power adapter (sold separately) and the included cable. You can also connect the included cable to your computer’s USB-C port for charging, transferring files, and more.
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Apple Support
support.apple.com › en-us › 111752
About the Apple USB-C to Lightning Cable - Apple Support
Here's what you can do with a USB-C to Lightning cable: Charge your AirPods, AirPods Pro, iPhone, iPad, or iPod touch when it's connected to a USB-C port.
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Apple Support
support.apple.com › en-us › 109044
About the USB-C to Lightning Adapter - Apple Support
You can use the USB-C to Lightning Adapter to charge your iPhone or iPad. For example, connect a USB-C to Lightning Cable to this adapter, then connect the other end of the cable to a USB-C power adapter.
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Apple Community
discussions.apple.com › thread › 252537678
I bought an iPhone 11 and got a usb c to … - Apple Community
If you have an older USB power adapter and cable from a previous iPhone or iPad, you can use that; or if you have a USB-C power adapter or computer with a USB-C port you can use that with the new cable or you can purchase a USB-C power adapter such as: Buy 20W USB-C Power Adapter - Apple ... As part of our efforts to reach our environmental goals, iPhone 11 does not include a power adapter or EarPods. Included in the box is a USB‑C to Lightning cable that supports fast charging and is compatible with USB‑C power adapters and computer ports.
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Apple
apple.com › all accessories › charging essentials › usb-c to lightning cable (1 m)
USB-C to Lightning Cable (1 m) - Apple
USB-C to Lightning Cable (1 m)
The USB-C to Lightning Cable connects any iPhone, iPad, or iPod with Lightning connector to a USB-C or Thunderbolt 3 (USB-C) enabled Mac. Buy now at apple.com.
Price   $19.00
Find elsewhere
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Wikipedia
en.wikipedia.org › wiki › Lightning_(connector)
Lightning (connector) - Wikipedia
3 days ago - The Lightning connector is used to connect legacy Apple mobile devices like iPhones, iPads, and iPods to host computers, external monitors, cameras, USB battery chargers, and other peripherals. Using 8 pins instead of 30, Lightning is much smaller than its predecessor.
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Paracable
paracable.com › pages › which-type-of-cable-do-i-need
Which Type of Cable Do I Need? – Paracable
This has been the standard cable Apple provides in the box since the iPhone 11 was released. The Lightning end goes into your device and the USB-C end goes into a charger with a USB-C port.
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Apple Support
support.apple.com › en-us › 105099
Charge and connect with the USB-C connector on your iPhone - Apple Support
If you have another device with a USB-C connector, connect the device to your iPhone with a USB-C cable, such as the one included with your iPhone. To charge a device that has a Lightning connector, connect the device to your iPhone using an Apple USB-C to Lightning cable.
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The Verge
theverge.com › circuit breaker › gadgets › news
The iPhone 11 Pro comes with a USB-C 18W wall charger and USB-C to Lightning cable | The Verge
For the first time since the original iPhone was released back in 2007, Apple is finally upgrading the included wall plug and cable that comes in the box: the newly announced iPhone 11 Pro will — at long last — come with a fast-charging ...
Published   September 10, 2019
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Apple Community
discussions.apple.com › thread › 254364798
Lightning Cable Connection - Apple Community
Apple has not changed this port since 2012 when they introduced it. So cables the can plug into one, should plug into the other with no issue. If it's too big, I would verify that the cable side you are using is indeed the Lightning side. Depending on how new the cable is the other side may ...
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Quora
quora.com › What-will-happen-if-you-connect-an-iPhone-lightning-cable-and-the-other-end-to-a-type-C-phone
What will happen if you connect an iPhone lightning cable and the other end to a type C phone? - Quora
Answer (1 of 5): Tried it just now I can say it works, the Android is proving power to the iPhone. My dumb self I ust bought the new iphone 14 and forgot to buy the power charger… Night comes and I need to charge the damn thing, only to find I don’t own a charger with usb-c! Tried this and it’s w...
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PCMAG
pcmag.com › home › how-to › mobile phones
Goodbye, Lightning Cable: How to Prepare for Your First USB-C iPhone | PCMag
September 18, 2023 - Apple's Lightning Connector is dead—on its newest iPhones, at least. Thanks to European Union regulators, all phones, tablets, and cameras will be required to use the USB-C charging standard by 2024, forcing Apple into USB-C port adoption. Greg Joswiak, Apple's SVP of Marketing, begrudgingly admitted last year that "we have no choice" but to move away from a proprietary charger to take up the more universal USB-C plug.
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Business Insider
businessinsider.com › business insider › tech › the iphone 11 is missing 6 modern smartphone features, and it feels like a placeholder for something better coming later
The iPhone 11 is missing 6 modern smartphone features, and it feels like a placeholder for something better coming later
February 24, 2020 - Alas, iPhone owners still need a separate Lightning cable to charge the iPhone. There have been some improvement to the USB-C situation with the iPhone 11 Pros, however. The "Pro" iPhone 11 models come with Apple's 18W fast-charger and a USB-C-to-Lightning cable.
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British Modules
britishmodules.com › products › usb-c-to-lightning-cable-charger-fast-charge-apple-iphone-macbook
USB C to Lightning Cable Charger Fast Charge Apple iPhone 11 12 13 14 – British Modules
USB C to Lightning Cable Charger Fast Charge Apple iPhone 11 12 13 14 Pro Max MacBook
At British Modules we are all about genuine performance and quality. We source the best and make sure the product does exactly what it says. We are now introducing one of the fastest and most durable cables on the market.Baseus Type-C to Lightning Cable is a 1.5 4.92ft length made for you Apple Devices. You can now connect your iPhone, iPad or iPod with USB-C to Lightning connector or Thunderbolt 3 (USB-C) - enabled Mac for charging or syncing, or to charge your USB-C enabled iPads.We recommend using this cable with your Apple 18W, 20W, 29W, 30W, 61W, 87W or 96W USB‑C Power Adapter to charge y
Price   $7.41
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uni
uniaccessories.com › home › blog
About the Apple USB-C to Lightning Cable - uni
Check out your iPhone charging cable. Which type of USB connector does it have? Maybe USB-A. Actually, most iPhones utilized the Type A USB for its high-speed and reliable charging, in the old days. Nowadays, the scenario is a bit different to boost the charging speed even more. You have a USB-C to Lightning cable to speed up the charging.
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Reddit
reddit.com › r/apple › let’s talk about usb-c on iphone 11
r/apple on Reddit: Let’s talk about USB-C on iPhone 11
February 9, 2019 -

Hello. As a lot of us know their have been many rumors regarding USB-C replacing lightning on iPhone 11. From what I understand many people are excited. I am not. I am making this post to explain the downsides of USB-C replacing lightning on the iPhone.

  1. Compatibility with all the accessories you have invested in over the years.

When the iPhone 5 introduced the lightning connection port everything changed. All former accessories no longer worked. So from that point on iPhone users replaced all of their old accessories with lighting compatible ones. Myself and many of you have invested a lot of money into lighting compatible accessories we use every day. Any pair of lighting headphones will no longer work. Your super expensive iPhone dock won’t work. All of your chargers you bought including the expensive keychain one from Native Union: Not compatible. So enjoy spending hundreds of dollars replacing all of those accessories when the iPhone ships with USB-C.

2. The industry is not ready yet.

When Apple introduced USB-C on the MacBook people were mad. There were not enough USB-C compatible products on the market. If you wanted a USB-C flash drive that would work with your new MacBook, it would most likely not work with any other computer. So you had to buy more adapters. While this is a pain it’s bearable as their is more room for docks and adapters in a MacBook. However there is not on an iPhone. You hate the headphone jack adapter? Think about x20 the headache.

3. Ease it in.

Remember when the MacBook Air came out? Remember how people were infuriated that Apple removed the optical disk drive. Steve Jobs new that optical disk drives were going to become obsolete in the future and wanted to help speed that along (like flash). But Steve Jobs did NOT remove it on the Pro series. Instead, he waited for the industry to adapt before removing it on the flagship product. Today Apple needs to be patient with USB-C adoption. They were doing good so far starting with the MacBook and then the iPad. But adding it to the iPhone this year is NOT easing it in. They need to put time between adding USB-C to the iPad and adding it to their flagship product.

If you read all of this I appreciate it. Please upvote so we can get more people to see this. Feel free to leave your option in the comment section. Thank you.

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CableCreation
cablecreation.com › blogs › news › get-usb-c-to-lightning-cable-fast-charging-for-your-iphone
Get USB C to Lightning Fast Charging Cable for iPhone | CableCreation
December 30, 2022 - Fast charging is a handy technology that Uses a USB C to lightning cable can charge your phone to 50% in just 30 minutes when the phone is low on power.