GolfPad GPS works well with my Galaxy Watch/Galaxy S9 combo. Here's the caveat: The phone app is free, but you must purchase a subscription for $19.99/year to use the app on the watch. I bit the bullet and have been using this combo for several years.
Alternately, myRoundPro (a TaylorMade/Sammy co-op) is free. It is not quite as easy as GolfPadGPS to use during a round, but also works well in spite of some of the negative reviews. This app uses more battery than GolfPadGPS.