This looks like a software issue. Check out doing a factory reset after backing your stuff up to micro SD etc ES fileExplorer:appBackup etc then reset. Battery stats bin can be hacked or altered between OS and updates or FOTA firmware Over The Air updates that can seriously inhibit functionality (think @pell a few years ago). So try that. Or if you have root, try battery stats erase via root app. https://forum.xda-developers.com/showthread.php?t=1099808 -nand26
no, cameras are not part of the prox module located on the display itself. you have to switch the prox module from the old display to the new one, the bundle of prox sensor, ambient light sensor, receiver, top mic and face id module. or run repaircal on new display assembly with NEW prox module etc OR ELSE face ID won’t work