My Touch ID isn’t working

Make sure that you have the latest version of iOS or iPadOS. Make sure that your fingers and the Touch ID sensor are clean and dry. ... Go to Settings > Touch ID & Passcode and make sure that iPhone Unlock or iTunes & App Store is on, and that you've enrolled one or more fingerprints. Try enrolling a different finger.

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

Touch ID not working at all.

MacBookAir - all up to date with Montery 12.2.

There are no fingerprints stored.

the only change could be that i accepted Apple Family Sharing, but can't imagine that is the issue.