Face ID showing "position your face within the frame" but not working on iPhone

Follow Apple’s recommended steps at If Face ID isn't working on your iPhone or iPad Pro - Apple Support

ruban09 Said:

"Face ID showing "position your face within the frame" but not working on iPhone: Face |ID has suddenly stopped working and when trying to reset I'm faced with 'position your face within the frame' but (other than the frame pulsing) nothing happens."

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Troubleshooting FaceTime:

A. Links to Refer to:

• If you can’t Turn on or Sign in to iMessage or FaceTime - Apple Support
• If you can't Make a FaceTime Call on your iPhone, iPad, or iPod touch - Apple Support
• If you Experience an Error when Trying to Activate iMessage or FaceTime - Apple Support

B. Report this to Apple

Do your Part: Provide Apple with feedback on this, letting them know about this issue.  Apple may not get back to you directly, but the more feedback they receive on this, the more they will know what is occurring, and what bug fixes to include in updates to come. Apple will know nothing of this, if you don't report it to them.

1. Go Here: Feedback - iPhone - Apple
2. Select: "Bug Report" for the "Feedback Type"
3. Comment: on when this all began, and how you've troubleshot it, thus far. Include the URL of this thread
4. Proceed from there as necessary