Face-id not working, non-original screen, no visible damage
Hello, I recently got an iPhone 12 pro max off eBay with a horrible quality aftermarket display. This meant iOS 16 wasn't working so the seller sold it to me as broken. I reverted it back to iOS 15.6 to get the screen working again but now the face-id says it's unavailable.
The seller swears it was working for him on iOS 15. The ambient light sensor works, 3utools says the front camera is original and I can see the ir light when trying to take a portrait selfie. However this also does not detect my face (keeps saying move further away). I am not sure if the ear piece was replaced but this seems unlikely since you buy a display without it normally? Could it still show the ir light even with a replaced ear-piece? Any way to fix face-id? I tried resetting restoring and everything. Face-id was also not working on iOS 16.3 (used voiceover to confirm that).
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