IIRC, Way back when I got my gw1 there was an app I used to trigger the camera on my Note8(?). Now I have an s21+ and cannot find it, even to download it. My gw1 is a tizen version if that matters.
Support has ended for all Galaxy Watches running on the Tizen OS. This includes all Galaxy Watches 3 and below. If you want the ability to download new apps, you will have to upgrade. Maybe the Galaxy Watch 6 Classic would be a good replacement? You can read more about Samsung's schedule to sunset Tizen here:
Tizen is no longer supported, Samsung since the watch 4 series has moved to Wesr OS by Google.
To get camera control on your watch you will need to purchase any watch that is Watch 4 series and above. You can get a 4 series pretty cheap on the secondary market. Just make sure it is fir the US market.
