After jailbreak my Face ID disappeared (only in apps!), I can use Face ID only for unblock iPhone. I tried to delete all tweaks related to Face ID (like Bioprotect) but it didn’t help.
In NewTerm2 or via SSH, run the following commands:
su
(will ask for password, enter alpine)
launchctl unload /System/Library/LaunchDaemons/com.apple.backboardd.plist
&& ldrestart;
launchctl load /System/Library/LaunchDaemons/com.apple.backboardd.plist