I've personally met more women into vtubers as a whole than men. Though, I've met a lot more men who exclusively watch a single vtuber to an almost obsessive degree. This probably has its roots, like most things in the scene, in Japanese idol culture. At least from what I've seen, women are more likely to enjoy the entire experience surrounding the industry instead of just a single idol or group

Also, this completely ignores the small but not insignificant minority of male vtubers

Are VTubers mostly attractive looking female characters?

I’ve met a decent amount of lesbian vtuber fans so I don’t think this is necessarily true.

Hey buddy, you ok there?

Alternatively the male porn abuse epidemic.