Why my Face ID doesn’t work

Follow whichever of these instructions most closely describes your symptoms:

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

or

If Face ID isn't working on your iPhone or iPad Pro - Apple Support

Be prepared: If it’s a hardware issue (not uncommon) repair will require physical access to your iPhone by a repair technician.

This is generally a hardware issue. If the unit's on an OS version older than 16.6, you might be able to fix it by updating it from a computer or the Software Update function in Settings; otherwise, contact Apple Support.

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Hello ~ If working back through the steps in the article you came from doesn’t help you may need to have your iPhone checked…

Genius Bar Reservation and Apple Support Options

Also you may go to lower left and click on Support. Also..

If Face ID isn't working on your iPhone or iPad Pro - Apple Support

~Katana-San~