For wahoo I implore all users to raise a ticket or email Wahoo in order to upload structured planned workouts.
See this chain - Push workout to Wahoo - #62 by Ben
Email - [email protected].
Request Ticket - https://support.wahoofitness.com/hc/en-us/requests/new
Only takes a minute and I did get a response from them so does look like they are considering requests.