Apple has decided to issue an update that will make iPhone 13 screen replacements a lot easier. Currently, iPhone 13 screen replacements break Face ID if the microcontroller attached to the old screen isn't transferred to the new screen. After the update, screen replacements won't require transferring the microcontroller.
https://www.notebookcheck.net/Apple-backs-away-from-controversial-iPhone-13-screen-replacement-procedure-that-breaks-Face-ID.578153.0.html