Face ID And True tone Disabled

Hi, so I got an iphone 12 from somebody that disconnected the front ear speaker because he said that the cable is broken and the problem is of course the face id because when I try to set it up it says "Face ID is not available, Try setting up Face ID later. And my question is theres a way if i connect the broken cable to the motherboard again will I regain the face id and the true tone function back ?(I know probably it is a stupid question but i am very curious because I have an iPhone x which has the same problem, but on the iPhone x I can t even tap on the "set up Face id" because it says something like "a problem has been detected with your true depth camera"....blah...blah).