EDIT: So you don't have to read thru all the pages, there is an issue with the lock screen not working properly with both a screen protector and a case. All user seem to have this issue, but Apple has yet to acknowledge the problem.
Please leave them feedback if you're having this issue. Below is the link and a template I made if you don't want to write it yourself:
https://www.apple.com/feedback/iphone.html
"
There is a problem with the lock screen not detecting presses on the camera, flashlight or anything
unless you press very gently.
Issue only occurs when using BOTH a screen protector and a case.
If you touch something conductive like the frame or the camera lens frame it works."
Right after I got my iPhone 12 Mini I put on a PanzerGlass screen protector and started using it.
My problem is touch on the lock screen, if i try to use the torch or pause/play music it only respons sometimes.
After i unlock the iPhone touch works great, but on the lockscreen I have to get lucky with the touch to get the response.
Anyone else having this issue?