Face ID is not working on my iPhone

"My Apple faceID is not working : I don’t know my FaceId is not working I want to reset so they said to turn off device protection option as I am unable to do it I don’t know why"

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Troubleshooting Password Face ID:

Start with a Force Restart:

Save what information need be, and then Force Restart your iPhone. Go here: Force Restart iPhone - Apple Support

Face ID:

There are know stand alone updates for Face ID that I am aware of. So, what's the issue?

Overview these two links:

• If an Alert Says Face ID has been Disabled on your iPhone or iPad Pro - Apple Support

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