My Face ID has been disabled

The link on top of this page which you had visited, before posting this question here, is shown under the "Related Article” that may have given you an answer.

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If you still need help, reset Face ID, then set it up again. Go to Settings, tap Face ID & Passcode, then tap Reset Face ID. Next tap Set up Face ID to set it up again.

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