Like I said somewhere else, I think anime and manga might increasingly skew towards male but because many more gravitate to it as they can’t stand Western works becoming more politically correct. Never mind that Japan itself might have its own version of political correctness and there’s even an anime with Ainu (one of the longstanding ethnic minorities there) in it. I think it’s unsurprising that it’s going to be that way.
A kind of role reversal from what I observed during the 2000s. The fact that more (cishet) men are gravitating towards anime might explain the phenomenon of Alt-Right users having anime avatars. It’s coincidentally true as superhero media’s growing more politically correct. Even if it still makes stupid mistakes every now and then to be honest. But it does adequately explain some things.
Now if that’s the case, expect more of it to continue.