I would love to see the Tour Divide as a new challenge and route. 2700 miles from Banff CA to Mexico border. Almost 100% gravel with 200,000 ft of vertical along the way. Not a route for workouts, only challenge rides. Run or bike actual course north to south or south to north. Reward is a saddle of granite on every bike in your garage.
What you’re describing is similar to the Chasing Tour on Zwift. You should not expect that Zwift will add a bunch of new long climbing routes for you, because they don’t do that. But an event series could be created that would sort of simulate the event using existing routes.