I believe that the issue here is that the new parts are not paired to that logic board. This is a thing that happens with iphones that prevents you from repairing things on your own. The phone intentionally disables FaceID when you do this to try to deter people from repairing. Apple and the Apple Certified repair shops have the pairing software. To confirm this is not a hardware issue, you did the repair correctly, it is just and IOS thing. You could go to a repair shop or go to Apple to get this fixed, or you could just not use FaceID. Glad that you repaired something!
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