Here comes the latest dot projector repair technique for Face ID move iPhone a little lower/higher iPhone XS Max Face ID Not Working Fixed - Dot Projector Repair
Here comes the latest dot projector repair technique for Face ID move iPhone a little lower/higher iPhone XS Max Face ID Not Working Fixed - Dot Projector Repair
Sounds like you damaged the flex cable when replacing the screen. Check carefully and take the following repair guide as a reference. One Solution To Fix 80% iPhone Touch ID Failure
How to Fix iPhone X Face ID Not Working 'Move iPhone a Little Lower/Higher' Update (10/08/2020): Here comes the latest dot projector repair technique for Face ID move iPhone a little lower/higher iPhone XS Max Face ID Not Working Fixed - Dot Projector Repair
Hope this repair guide can give you a hint. How to Fix iPhone X Face ID Not Working 'Move iPhone a Little Lower/Higher' Update (10/08/2020): Here comes the latest dot projector repair technique for Face ID move iPhone a little lower/higher iPhone XS Max Face ID Not Working Fixed - Dot Projector Repair
Face ID relevant flex cables might have been ripped-off or relevant components were knocked-off during phone disassembly.
Very suggestive! I saw someone got it worked on an iPhone X but not any tests on iPhone 11 yet. Someone out there might be working on it now.
What do you mean by a backlit Apple logo? I know there are tricks for a glowing apple logo.
Thanks for your support!