Has anyone had a problem with the oxygen monitor not working while you're asleep.
Solved! Go to Solution.
One of my colleagues confirmed what Nickh101 said in their updated OP: BUH9 update for the Watch should have this feature now:
They've advised that once the update is installed, update the Samsung Health app and make sure it's turned on.
And another user here: https://eu.community.samsung.com/t5/wearables/galaxy-watch-4-classic-oxygen-sleep-not-working/m-p/38... has also confirmed the feature works for them now.
UK R875F Galaxy watch 4 4G here and I haven't received any update, so not really a solution if it's not available to all owners. Any reason why it's not available to all?