Ebony
https://www.mangago.zone/read-manga/ebony/
TW: You might get triggered several times because of how low they think of women. They can’t even have basic human rights
I should add that this story revolves around how the FL manipulates the society - that thinks low of women - and teaches women how to fight back. You might get mad because she sometimes gets help from the ML but in a world where women is only used as a breeding machine and brides for sale shit, it is very helpful that he could use the ML’s influence.

Soooooo, this is gonna be hard to expect from the isekai genre lmao, but do peeps know any romances/dramas with a close to accurate setting of how men thought at the time (like old-fashioned feudalistic mindset that affects opportunities for women).
some excellent examples of this are the game of thrones books, or even Mulan, but since we don't anything that good, some isekai examples are
Queen Cecia's Shorts
They Say I Was Born a King's Daughter
the there are quite a few in this genre where you have a reincarnated protag where the reincarnation is irrelevant to the plot, or she knows the future and hence is saved, or she is off to be married due to her father's decision but a man saves her?? like I know that's accurate that men had to save women back then, but also women would have never been allowed to speak to men one-on-one or even propose marriage so that's kinda dumb.
so i'm seeking something where women face extreme adversity from their peers, from society, from even their loved ones and rise from the ashes to create something better for themselves and ultimately impact society as a whole in a the story.