https://www.vice.com/en_us/article/g5qbxj/the-iphone-13-screen-is-a-repair-nightmare-that-could-destroy-repair-shops-forever

A tweak to the iPhone’s repairability that has been long prophesied and feared has finally come to pass, giving staggering new urgency for legislation that makes repair more accessible: The iPhone 13’s screen cannot be replaced without special software controlled by Apple. This is a devastating blow to independent repair shops, who make the vast majority of their money doing screen replacements, and, specifically, make the vast majority of their money doing iPhone screen replacements.

According to iFixit, replacing the screen on an iPhone 13 disables Face ID functionality. That’s because the screen itself is paired to a small microcontroller attached to the display. Replacing a cracked screen with a new screen will disable this pairing, thus breaking a core piece of functionality in the phone. An authorized Apple repair tech can pair a new screen to an iPhone with the click of a few buttons using proprietary Apple tech. Everyone else will have a much harder time.