The front-facing camera assembly is paired in that the FaceID will no longer function however the camera should still operate fine for pictures/video. [br]
If you’re having issues with no camera display, you can 1. clean all the connectors with iso alcohol and make sure they aren’t loose on the board 2. factory reset the device to remove any conflicting apps or corrupt data that could be causing it 3. try the camera in another device or try another camera in your device, the assembly you have may be faulty.