Is Component reprogramming required on iPhone 6?

Hello,

I got an older iPhone 6 from a friend, as my old phone was literally falling apart and isn’t worth repairing. I wanted to replace my screen and battery (as it doesn’t hold a charge long enough) and I’m also intending to use Touch-ID with Apple Pay.

As this is an iPhone 6 with iOS 12.5.1 (an older model with an older iOS version), I wanted to ask if it is required to reprogram the replaced components or if you can just replace the non reprogrammed components without getting any warning about non genuine components.

Thanks for the help :D