Locking so that related discussion can be done in one place (sorry to cut off the conversation right after your post SgtSurehand).
[deleted] This is assuming an attacker doesn't have any exploits, not that I know of any. USB-C settings can make this much harder, along with other security improvements in GrapheneOS, obviously. Assuming no exploits (again, I don't know of any), yes, a 6 digit PIN is fine.