So iphone has this great feature with which, you can make notifications hidden until the phone sees your face and authenticates it's you.
eg. my sister gets a notif on her phone and I don't have my face registered, so the phone won't show notifications to me until it sees a registered face.
android doesn't have this feature, so I think grapheneos may be the first to bring this feature to android!
I get that face unlock on pixel is less secure, so don't use it to unlock the phone, just use it to add an additional layer of privacy by hiding notif and still needing a fingerprint to unlock the phone.