Your Samsung smartwatch can control your phone's camera and view exactly what your phone is seeing! It's great for taking a group shot, so you can see what's going on before you snap a photo. All you need to do is download the Camera Controller app on your watch and Samsung phone.
Note: This app is supported on the Galaxy Watch Active, Galaxy Watch Active2, Galaxy Watch3, and Galaxy S9 and up only.
Thanks to Tallman for providing the information.