Is there a way you can get her involved in a club/group with like-minded girls? The friends she makes from 10-12 will provide a trajectory as she starts dealing with puberty/hormones. Her parents will not have as much influence as friends at that point. So if she starts making feminist friends now, it'll pay dividends later.
Sometimes the local girl scout troop can be a great pro-girl choice. Depends on the individual leaders, of course.