@duathlondan I have read that the long term plan is to be an open platform but as of now workouts only sync to Wahoo devices. I can confirm it works great for cycling workouts used on a Wahoo Bike computer. I haven’t tried it on a Wahoo Rival watch.
One workaround to get it over to Garmin would be to use something like TrainingPeaks or Todays Plan to sync your workouts. There is a browser extension that allows for importing cycling workouts to a fit file which you could then upload. The browser extension works great for cycling workouts but I have not tried it for running workouts.
Also note that if you want your run to appear in the Wahoo calendar while using a Garmin watch you will need to dual record with the Wahoo Fitness App on your phone.
Wahoo is much further along in supporting competitors stationary trainers than with competitor bike computers and watches.