Having now owning my 2021 F150 XLT 302a packaged truck with 360 cameras, Pro Trailer backing, and a few other options for a year now I will chime in.
Mine has the 2.7L twin turbo V6 and 10 speed auto. It will get 24 MPG on a road trip and mid high teens towing the trailer with 3 wheel motor cycle back and forth the Arizona. This little gasser moves the 4800 lb truck along just fine, with a reported 0-60 of just over 6 seconds. Mine came with GY Wranglers.
Sync 4 on the 12" display is coming up to uconnect levels. And the display is well integrated into the dash. The fix for the brake controller was download OTA, and recently they did some other OTA changes that will allow more issues to be addressed with OTA updates.
Truck now has 12,713 miles on it, I just opened the Ford Pass app on my phone to check that! I did a first oil change at around 5K and have an appointment for oil and filter change before leaving for Arizona in 12 days. I have had a few strange problems with the sync 4 system and will try to follow ED's suggestion to not plug the phone in until wireless android auto makes it's connection.
I have had a couple false causes of the truck thinking that it was going to run into something while on adaptive cruise control. One on the things about adaptive cruise is that it maintains the same speed up and DOWN hills, so it is using it's brake automagically going down hills. Brake wear lingers in the back of my head. I may use normal cruise controller on my return to Arizona and see if I get better mileage.
I do miss my power folding mirrors that the RAM had as part of the Laramie package! I do not miss the current diesel prices in the NW, which is a dollar or more higher than regular gas.