The Galaxy S21 series is currently touted to launch soon. Their launch is now said to mean the end of support for some older smartwatches or fitness bands from the same OEM, however. They may still work with older phones, though, just not those released after 2020.
https://www.notebookcheck.net/Older-Samsung-wearables-may-not-work-with-the-Galaxy-S21-series.508213.0.html
These wearables still seem like gimmicks so I'm not surprised.
I had to retire my old Gear S a year ago. Loved the big curved screen & it was simple to use. (notifications, sending/receiving/conduct phone calls, pedometer, HR monitor). Less a gimmick, just a basic companion wearable minus all the pile-on junk. only cheesy part of it was the charger clip - which broke so I had to rig with rubber band each night.
Samsung should end support for everything older than the Gear Fit2. And then make a newer Gear Fit using a screen larger than the Gear S. And keep it simple. Doesn't need to be an Apple Watch competitor.