I was about to write "absolutely nothing", but as it turns out, if South America-type homicide dynamics spread across the world, there would probably actually be fewer female murder victims then there are now.
That's because the very concept of "femicides" is a joke. It's literally just murders like all others, and there's about as much of a reason to give them a special name and treat them like a special phenomenon as there is for doing the same to "androcides." Feminists love to say "oh, those women were killed just because they were women, that's what makes it special
", completely ignoring that in those South American countries, the vast majority of male murder victims were likewise killed simply due to their gender, whether by being perceived as a threat to drug traffickers in ways women wouldn't be, due to being the love rivals to drug traffickers, or for living in areas controlled by rival gangs and being killed due to the possibility of them later being recruited.
Anyway, to get back to the topic:
en.wikipedia.org
There is absolutely no "femicide epidemic" in Latin America, because not a single one of Latin American countries is anywhere even close to the countries with the highest ratios of female murder victims. Those are European countries actually. If anything, we should be talking about what would happen if women in Latin America started being 20-30% of murder victims like they are in many places in Europe.
The entire basis of the "femicide" bullshit, is the fact that Latin America has sky-high homicide rates in general, so, naturally, there will be places where more women than average are killed, and given how high the averahe is in the entire LatAm, those places will have hundreds of dead women there. Given that humanity is a gynocentric species, that then means that when we see those hundreds of dead females, people get outraged and start screaming that that's a terrifying problem, in a way they never would've had they seen
thousands of dead male bodies.