Face ID disable

If the issue persists (after performing the steps provided in the support article that led you here), contact Apple Support directly, using this specific link:--> Apple Support , or make an appointment and have your device inspected at an Apple Store or AASP (Apple Authorized Service Provider) among this list:--> Apple – Location Selector. After checking it out, they'll give you all the available options.

Regards

Giulio

This happened to me three days ago. After trying to reset, my XR wouldn’t hold a charge. Saw a tech at the Apple Store, couldn’t tell me specifically what had happened or why. Walked out with a new phone.