15 Pro Max. My old car charger was a generic lightning cigarette plug not even fast charger for my old X. What’s the best charger now a days for my new 15 Pm?

Is anyone else having issues charging there phone in the car? I was completely baffled at why I couldn’t charge the 15 pro max in my car. I tried numerous cables and even bought ones that I saw were recommended and still wouldn’t work. My wireless charger that’s built into the car wasn’t working either. I’ve only had the 15 pro max for a week so was finding this odd. I ended up switching back to my 14 pro max since I had no issues charging it before and guess what same exact issue. Now, both phones show they are charging but the charge doesn’t increase no matter how long a drive I do. I then started wondering if something was up with my car so grabbed my Samsung phone to see if it would charge. Guess what, the Samsung charges with the cord and the wireless charging. Is there anything I can do to fix this? I’ve already factory reset both iPhones and they are fully updated. My guess is since it’s an issue with both this means is a software issue. Anyone else having this issue since updating? I’m hoping Apple realizes there an issue and gets this fixed soon.