Ah, this seems more like an issue of marketplace requirements for submissions. I’ll pass that along to the marketplace team and let them know it’s not feasible for female animations.
EDIT: Yep, I see all the female animation packs include their own meshes, so they can’t just submit the animations. That’s a good reason to either make exceptions or see what else we can do to fix that.
As far as how are you expected to make a female skeleton, you’ll need to watch modeling tutorials, then use our documentation for FBX importing/exporting and Character Setup. Additionally, there are free female character models that are provided already through the animation pack where you can see how they were implemented.