biometrics

Here's a Naomi Brockwell video about it. I also used to avoid it, but that video changed my mind. I can easily turn off the biometrics if I'm going somewhere where LE might force me to unlock it (e.g. travel), but I can just mis-scan it a few times and it'll force me to enter the PIN anyway.

Tasker

Yeah, that can work, but GrapheneOS at least has an automatic reboot option after so much time has passed w/o being used. I set mine to 4 hours so it'll reboot at night, but I make it a lot less when I'm traveling. Everything is encrypted on a fresh boot and calls still work (emergency outgoing, and any incoming), so it's a really nice bit of extra security for lazy people like me.