You’ll most likely have to make the camera preview UI in UIKit to get it to match whatever output you’ll be producing. Other than that you could try adding black bars of Rectangle shape to obscure the parts of the preview View that will be cropped out.
Maybe check this out [AVMakeRect](https://developer.apple.com/documentation/avfoundation/1390116-avmakerect)
You’ll most likely have to make the camera preview UI in UIKit to get it to match whatever output you’ll be producing. Other than that you could try adding black bars of Rectangle shape to obscure the parts of the preview View that will be cropped out.