Samsung has not forgotten the Galaxy Watch Active 2 or Galaxy Watch 3, its last smartwatches to launch with Tizen OS. While it has replaced the pair with the Galaxy Watch 4 series, Samsung has issued significant updates to both that introduce new health features and watch faces. The updates have even made their way to the older Galaxy Watch and Galaxy Watch Active, too.
https://www.notebookcheck.net/Samsung-Galaxy-Watch-Active-Galaxy-Watch-Active-2-Galaxy-Watch-and-Galaxy-Watch-3-receive-major-updates-containing-new-features.579316.0.html