Earlier quoted context omitted.
So as I understand it, all of the "parts" are mostly worthless because they wont just work in another iPhone. How do you maintain this functionality and give the "right to repair"? I would assume that it's possible but would add a fair bit of cost to devices (not that someone like apple cant bear said costs)... But IM just guessing on that front as I have zero experience with hardware locking.
Most parts will indeed work. It will just show "unkown part" in the settings. The main thing that is really paired is the front camera for faceID. Also changing the screen without the original paired chip makes you lose autobrightness and truetone which is need to get to MAX brightness on 14 and up.
source: i have this problem iphone 8