I was able to use Google Assistant as a work-around for my Galaxy Watch Ultra connected to my Galaxy S20+ 5G phone.  I don't use voice activation (i.e. "hey google") to activate Google Assistant on the watch. Instead, I set the watch to long press the home button to activate Google Assistant.  But I think it would work fine if you prefer to use "hey google" to activate Google Assistant.  I am able to activate Google Assistant then tell the watch to "play the next song" or to "repeat the last song" while streaming Pandora through the watch and it actually works! Crazy that Google Assistant can provide this functionality but the native music controller app won't allow it. ... View more