Face ID stopped working on my iPhone 12

I’ve had the same problem for quite a time. I followed all Apple’s support steps and nothing fixed it.

I took it to the Genius Bar and their diagnostics determined a problem with the true-depth camera.

The battery has to be replaced with it.

Out of warranty cost is $249.

In many cases, this indicates a hardware failure.

You can try the steps listed in this article to see if it’s a software problem: 

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

~Lyssa