Gender bias in STEM? That's a god damn first-world problem.
https://www.bbc.com/news/business-39579321
"Most of the girls we talked to from other countries had a slightly playful approach to Stem, whereas in Russia, even the very youngest were extremely focused on the fact that their future employment opportunities were more likely to be rooted in Stem subjects."
Then, when wealth (and all other measures of gender equality) dramatically increase and people become free to choose to do whatever they want, largely free from economic survival pressure, suddenly, magically and inexplicably, "bias" pops up again.
https://www.theatlantic.com/science/archive/2018/02/the-more...
That's because you're not familiar with the actual data. Iran also has gender parity in STEM. The nordic countries have equal or worse gender ratios than America. It's called the gender equality paradox: the more gender equal a country, the less women choose STEM paths.