Wouldn't there also be people trying to reverse this? Like, feminists talk a big game about female seperatism and all, but men are kind of important to keep the species going.
I get that after a disaster like this your science community is devastated, but biology/chemistry is the only part of STEM with a large number of women in it. Surely there's labs out there looking for a way to bring the men back?
Or the labs could offer pre-op/testicled trannies a safe place to live in exchange for horse piss, because, guess what? They can still carry on the species. That would have been a whole different type of horror: slavery and forced breeding, and humiliation, and all kinds of psychological horror, and for the evil terfs aspect, they could have had the terfs trying to take out the facility.
Honestly, that sounds more plausible as a realistic plot for after a disaster like this. But, women are typically more practical, so it makes sense a woman would come up with a better plot. If I wasn't such a lazy fuck I'd write this.