Da, learning on their own is a different discussion. But teaching them in classrooms is clearly, universally forbidden.
Maybe sara schnirer did – i have no idea. Maybe she skipped those parts of the Chok; does it really make a difference? She never taught gemara or mishnayos to her talmidos, nor did she instruct her trained teachers to do so either. It’s not really an important issue.
And there were very, very few women who learned Torah throughout history. You can count them on one hand. The idea that it’s something women should aspire to when it was a very, very rare phenomenon that always accompanied intense spiritual devotion and impeccable tznius, has nothing to do with today’s women who want to learn gemara because “we can do it too” while wearing short sleeve and not covering their hair.