FaceNotify by K4CZP3R
This app will hide content of your notifications and show it only when it recognizes your face!
It supports OP5/5T/6/6T (and maybe more, go test it out!)
App is in beta stage.
App have it's own thread in OnePlus 6 Theme, Apps and Mods.
Device specific question (OP6T) can be asked here, other questions via OP6 thread.