Face ID not working on iPhone 13 after iOS 17.3 update

The issue is with "Screen Time" setting, turn it off and "Face ID & Passcode" will re-appear :-)

after ios 17.3 face id no longer listed u… - Apple Community

Use the toggle for "Share Across Devices". When green it is on and no Face ID option. Toggle it off and the Face ID option will appear again. You can then come back and toggle "Share Across Devices" back to green and the Face ID option will still be present.

In my case, Share Across Devices was already off. Content & Privacy Restrictions (also under Screen Time) was on. I toggled it off, went back to the Settings menu, and Face ID & Passcode appeared, and I was able to turn on Stolen Device Protection. When I went back to Screen Time and turned Content & Privacy restrictions back on, Face ID & Passcode vanished from the Settings menu again. Turned Content & Privacy Restrictions back off, Face ID & Passcode appeared again, and Stolen Device Protection was still on. So I assume that after it is set, the setting remains on even if the ability to toggle it disappears from the menu

This worked for me to get Face ID back. Toggled off "Share Across Devices" and went back to Settings. In a few seconds I could see the "Face ID & Passcode" option appear between "Siri & Search" and "Emergency SOS".

Kinda strange to watch the entry appear on the list. Works now and I could set the new "Stolen Device Protection" option.

Just be sure to remember your "Screen Time" passcode...

I am very grateful for this tip!

Same issue with my iPhone 13 Pro Max! Works fine on iPhone 12.

Same on iPhone 11