Without any reason, why I can’t use my Face ID

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.

(242331)

No. You'd need to contact Apple Support.

(242357)

Oh, I was just confused about the other comment you posted about updating it via computer or you could try using the settings on the phone itself. But thanks so much for responding even if there is no quick fix in my situation. 😁

Is there any way to do an update to fix the Face ID if you’re phone is already on the latest version?