Chrome Users: Please note that LastPass has problems in iOS/iPadOS and as of 13.3.1, the fault is still present. All is not lost however as LastPass in the below example is tested and known to work correctly with Firefox as of iOS/iPadOS 13.3.1.

iOS/iPadOS Settings

1. Open Settings
2. Choose Passwords & Accounts
3. Select AutoFill Passwords
4. Check the box next to LastPass
5. Uncheck the box next to iCloud Keychain.

LastPass App

Before you can access any passwords, you must have the LasstPass app installed on your iPhone/iPad and be logged-into the App with your LastPass Master Password

Web Browser

Although this example uses Firefox, the process is almost the same for Chrome users.

Step 1

1. Select the password field.
2. Open the share dialog by tapping on the 3 dots (Chrome users tap the share icon).
3. Choose "Share Page With..." I did say the process was counter-intuitive...

Step 2

Tap LastPass

Step 3

Tap the password offered in the LastPass dialog.

That's it.

Conclusion

Although not a very intuitive process, using LastPass with a browser on iOS/iPadOS it's still pretty easy to use.

I use the LastPass app and I have iPhone 12 Pro so not sure if the app functions the same as on Chrome…when I add a new site, it took me a while to realize I have to click on the blank spot where the password goes and an option pops up to generate a password. Hope this helps.

Good luck!