Gadget bridge doesn’t really work for any “new” (i might be wrong here) devices.
Most newer Garmin devices should work since 0.82 (and earlier with nightly). It’s not feature complete compared to using Gadget Connect but should be enough for most use cases, unless you really care about the social/awards aspect and some of the deeper metrics (although if you’re handy with SQL you can handle that yourself).
Not being able to set an event date and have “daily suggested workouts” follow that is my only annoyance, although I’ve been happy just using the defaults for now.
0.82 is only two weeks old, so you would have needed nightly up until that point for most newer Garmin devices. I did uninstall Connect shortly after but I think you just have to make sure it’s not running, as I know some use both apps.