I feel like this may be a bit of a counterintuitive question considering Graphene's privacy features but, is there a way to remote erase or find my phone with GrapheneOS in the event the phone is lost?
Its been a while since I last checked the forums but iirc no. Best you can do is set up automatic reboot in order for it to be in it's most encrypted state after a specified time period again this info might be dated. My personal method is setting up a going out profile with the bare necessities with a weaker passcode and relying on a passphrase on my main user profile if it is found by a good person both the profiles have my burner email as a note on the lockscreen if they want to contact me.
It sits in the background and you set it to wipe your phone if you haven't unlocked it for a set number of days, the counter resets when you unlock the phone.