Touch ID is missing from System Preferences
Touch ID just stopped working on my 24" iMac (Monterey 12.2.1). I checked System Preferences but all Touch ID options were greyed out and I couldn't change anything. I thought I would delete the fingerprint I had been using and start again. After deleting the fingerprint and reopening System Preferences I now find that the Touch ID icon is not appearing there. I rebooted the Mac but it still doesn't show. How do I get back?