True depth camera

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

Have you read If an alert says Face ID has been disabled on your iPhone or iPad Pro - Apple Support

This is a user forum, you are not addressing apple here just fellow users

you can try contacting apple Support ->  Get Support (apple.com)