If you run it, I bet someone would add it as a category.

And there is a Discord for discussion and camaraderie: https://discord.gg/EVsvUxZ

I don't see why there should be a different series for the other Vex games; even Vex Mobile could be included in this series. The games themselves are still separate, and they are all thematically Vex games.

But it's up to the moderators to decide. I'd support adding them to the Vex series as it is, though.