Current state: there's little consistency between different parts of the Garmin eco-system.
On the watch, I can log (for example), "Indoor Rowing." It shows up in Garmin Connect with the little "Indoor Rowing" icon but can't be searched for as an "Indoor Rowing" activity - it's in "Other." (ditto Connect online - lumped in with "Other")
Then there are the missing activity types: no Nordic Walking? You can manually create "Nordic Walking" based on "Hiking" (or Walking) but there's no way to sort.
The "Activity Type" list in Garmin Connect mobile has everything from Motorcycling to Obstacle Running... but no Nordic Walking, and again you can't sort and search in Garmin Connect.
SOMEONE at Garmin needs to own this and make the UX/UI consistent, a la Apple. (or not, I guess - maybe Garmin isn't losing enough market-share to care *shrug*)