How about Sa Calobra as the next mountain on Zwift. It seems to have all the attributes you need for a challenging and interesting ride. It’s visually stunning (26 hairpins, take that Alp de Zwift.lol), it’s 10k long at an average of just over 7%, so it’s doable for most riders on Zwift in under an hour and wouldn’t be an endless slog like some of the Long alpine passes. And it is used by lots of pro. teams in their winter training so it’s got pedigree. Just a thought anyway. Ride on.
Would be nice, if only to ride The Cobra without a crazy wind going round ‘The Knot’ at the top.