Literally just set up new watch. Went to bed. No sleep recorded. Set up heart monitoring continuously and blood oxygen levels. Still no record. Reset device and tried again and still nowt.
I just got mine, so I'm a newbie old guy. I set continuous heart monitor, turned on bo levels as you did. The only other thing I did was swipe down and hit bedtime and turned it off in the morn. I didn't do the snore thing.