I am but a humble Shrimp.

[Dragon Lord]

There are indeed some male vTubers out there. Both company-signed and indie. Hololive has a sub-branch called Holostars that includes some male vTubers, although they are not nearly as popular as the Hololive girls are. I think the other giant vTuber company in Japan, Nijisanji, also has male vTubers on their team as well, though I've never watched any of theirs or looked into them. They did just recently open up auditions for English vTubers though, hoping to piggyback off the immense success of Hololive's English team.

Other than that, you can find some male vTubers on Twitch. I've personally never watched any of them and probably wouldn't have any interest in doing so, but you can find them if you look around.