camera , battery, and face-id issue but all is working!?!

i have this 13pmax from the usa after a screen replacement it gives the issues camera , battery and face-id but the all the happy thing :they just functioning all well i have been to repair whit it and they found no motherboard errors/defects... , so i am totally confused now or am i !?! saw someone with such issue with a rear camera issue and had he had it fixed but i was not able to find the link anymore, anyone had/have this same metaconfusion? anyone confucious? pls much appreciated