I just went and tested this using an automation between the duo cam doorbell and the palm lock.
I had to turn on facial recognition for the duo cam doorbell.
Friendly faces has two categories with two subcategories. There is a known faces category which you can split up between family and others, and there is an unknown faces category. Obviously I put my own face under family.
Then I set up an automation where the trigger or if condition was my front Duo. Cam doorbell detects a wes in the family category.
Then I set the action to unlock my front door Palm lock.
I went outside, locked the front door palm lock, and then put my face in front of the duo cam doorbell. Doorbell. As soon as it detected my face it unlocked the front door Palm lock.
Yes, totally works. It was slower than using the Palm detection though. I had to Wait a couple of seconds for the cloud AI to recognize that it was my face and then send trigger condition back to the Palm walk to unlock.
It is pretty cool though. I’m going to leave it turned on, and then I will only put faces in the family category of people who I want to be able to automatically unlock the door with their face. Anyone who I still want in the friendly faces recognition but who I don’t want to be able to unlock my door, I will just put in the others category.
But yeah, it totally works 
thanks for the idea. I’m going to keep this one