When Oculus Quest runs out of batteries, it shuts down without saving state. It should support hibernate/restore.
Lost 15 minutes of progress last night when Quest ran out of batteries just as I was completing a level in Last Labyrinth. Apparently the game doesn't save until after some cutscene completes.
If Oculus Quest used hibernate on low battery suspend, then users could pick up where they left off after charging the headset again.