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