This is a GrapheneOS feature by default, 18 hours but configurable to 30 minutes of inactivity. iOS implemented it too but it's done in 3 days of no unlock. The Shortcuts app could be useful for this as you can assign device restarts to a trigger. A more primitive shortcut could be to assign a reboot when the clock hits a certain hour such as when you're asleep. Stronger USB port security features would help, I don't see why Apple couldn't copy what GrapheneOS does with disabling Pixels' USB-C port at a hardware level when they create both the phone and OS.