My true depth camera is not working anymore did the new update
What do I do to fix the problem so it works
If you see a 'Face ID disabled' message, this document deals with that specific issue:
"If an alert says Face ID has been disabled on your iPhone or iPad Pro", click here --> https://support.apple.com/HT208186
If you just have issues with Face ID not working properly, read this document:
'If Face ID isn't working on your iPhone or iPad Pro', click here --> https://support.apple.com/HT208114