And some parts are can't even be swapped from one genuine device to another - home buttons used to be like that. But in newer iPhones that applies for other com

And some parts are can't even be swapped from one genuine device to another - home buttons used to be like that. But in newer iPhones that applies for other components too. IIRC some of them can be reprogrammed somehow but it is additional difficulty not nornally seen in other brands.