You can see it below on our calendar. That when you convert workouts it converts them to colored zones. We might change the colors… It’s a long discussion why I think this is good for HR but not for power zones… but we will leave that out.
It sends zones and I believe the way it will work in Garmin is that the Garmin zones will determine those ranges. I have not tested this yet in Garmin. so changing your zones in Garmin will fix this. How a person’s power converts to heart rate is very individual and so It’s not a simple conversion that is the same for everyone. So you don’t really have to set our zones other than what visually it will display and so that it matches up with what’s in Garmin.
It’s a bit confusing. HR and HR+ are two different things. It does not really make sense to convert HR workouts to HR+ as the nature of the two are very different. HR workouts are for outdoors or for Garmin devices for example. HR+ is generally for steady state efforts (mostly zone 2) that you design or manually set in real time in our app. We used to have HR mode also in our app but that cause even more confusion so we removed it.
You could clone a workout and create an HR+ version if you wanted but to me this does not make much sense. I could explain how to do this if you want.