After updating my phone to Android 10 the proximity sensor isn't working. I even tested in smmi test but nothing happened .it worked fine in pie.
Restart your lhone, and try in Safe Mode
Phone case and screen protector took off ?
If nothing works, then you have to reset your device. Sorry to say. If the issue persists after a reset. Then you need to send it for repair.
Will give it a try
It was the screen protector after all this time.
Good ! By the way, there is a caution about the usage of a screen protection in the manual of the phone 🥴 ...
yeah i was in the same situation with you, i thought i got defective device, then i took off the tempered glass then the proximity works well