Not all replaced iPad screens. Only non-OEM (third party) replacements.
https://www.youtube.com/shorts/0sWmBNj6Eok
A genuine screen from another iPad will cause this issue until you swap the chip from the old screen to the new screen.
I don’t have any inside knowledge but I suspect authorized Apple repair centers have access to a tool they can use to recalibrate the screen after replacement that the mom-and-pop shop doesn’t have.