My project has Fingerprint capability... but I have not seen data from my cameras with facial information (they could be too old or such), but if you are using my driver and can send some samples... at the very least I could try to get it to start putting the facial ID (if it is anything like the fingerprint one). Shoot me a message if you want to try it out. If you have questions about it you can always message me, or if it is more general then posting on the thread works:
[PROJECT] Driver for Unifi Protect Controllers - Community Apps and Drivers / Community Drivers - Hubitat