Matt,
Thanks for posting. Yes, Zwift requires the bike workouts to be in Power to sync with Zwift, so you would need the Pace and Power plan.
A not-elegant but acceptable solution would be to load the Pace and Power plan as your primary plan, then load the Pace and Bike HR plan for exactly a year away (or a date where the two plans don’t overlap). Then, on the rare days when you can ride outside, you’ll grab the HR version of the same workout in the future plan and use that one instead.
Our 80/20 Subscriptions provide the best solution for this, as you get access to the complete 80/20 Workouts Library directly within TP and can drag and drop any given workout in any given format (Pace, Power or HR) onto your calendar. But, my first recommendation will work just fine for free!
David