I'm on a Samsung Galaxy S9+ and have recently received the Android 10 update. Since then, notifications on my Steel HR Sport have completely stopped. Not only that, the app has trouble to connect to the watch at all. I have checked this list ...
- Do-not-disturb mode is always off.
... as well as the forum posts. Nothing has helped, and judging by the Withings subreddit, I am not alone.
I have also performed a factory reset of the watch and a new installation of the app. This has not helped either.