It has come to light that after screen replacement on the iPhone X and above there have been issues, home bar is not working but touch is OK Notifications Not Available and also Face ID not working, This does not happen on every iPhone, it appears to be random 10 in every 100. This seems to stem from ios 13 and the Bugs it has, these issues would still happen even if you took a brand new screen from a phone and swapped it out. Its a case of not upgrading just yet or waiting for the bug fixes to come out.
Another issue that we have found is that to ensure your iPhone battery is more than 60% charged and is kept above that when updating using OTA. A bug within the software can brick you iPhone so if you are updating plug it into a power source and back up your data