>>106687010female unicorns in niji are barely a thing, the very few that exist are ridiculed incessantly. what they have are either a. yumes who self-insert as one of the girls and b. fujos who want more guy-only collabs to jill to.
neither of them want to have girls who attract gachikoi because in their eyes anybody like that is an incel nerd who kills everything fun and wants them dead and this and that. even when they themselves are far more obsessed the image they have of themselves is heavily distorted.
so when it comes to mixed collabs the vast majority of the female fans consider them "necessary" as a sort of sterilization technique to remove these evil germs that would end up being a nuisance for their boys, regardless of whether they enjoy them or not. which yumes do and fujos less so if at all.
of course you also have a small group that just wants all the girls gone for good so they can focus on male interactions but again they're a pretty small group.