AOSP includes Trust Agent settings, which in stock Android allow users to set "trusted devices" like Bluetooth MACs which, when connected, allow the device to stay unlocked (the idea being, if your phone is connected to e.g. your car's Bluetooth, it's reasonably likely you are in possession of it and it is safe to keep unlocked).
In Graphene settings, Trust Agents settings exist, but there is no way to assign an agent. It seems totally deprecated. Is there any way to utilize it, perhaps through a Device Owner management app?