Sorry - I'm finding the Garmin forums to be some of the least intuitively organized place of any that I've visited, so maybe this is in the wrong place.
Spotify ... FIRST ... despite my Garmin Connect App on my phone updating my watch to the 6.0 update, when I went to download the Spotify app, it continually said that my 5X Plus required an update. I ended up having to download Garmin Express (hey Garmin - get your act together ... Garmin Connect, Garmin Express, what other Garmin UI is there going to be needed, and why can't everything be done from the mobile app???) to push the Spotify app to the watch. Anyone else have this problem?
Second, and the real question ... I thought you could push music to the watch through the Connect App itself, rather than the watch having to connect to a wireless network and download over Wifi???? How reliable will it be into the future to routinely connect to wifi? Seems taxing. Should be an option to push music via the connection from the Spotify app on your mobile to the watch or through a backdoor sign-in on the Connect app to the watch.
OR ... is there a way to do it that I haven't figured out, or the watch's Wifi connection and direct download is the only way?