You didn't really mention the affect of childbirth on the salary gap.

This wasn't about all the factors, just the literacy part. However, from what I have understood, I think the gaps still exist even when women don't have children.

Even though people are generally having kids later, it still usually happens during peak career-building years

One of my clients from several years ago purposely had her children young and did her studies as they were young. Once she went into her HR job, the other women started having their kids because they chose career first. By the time my client was 30, she was heading up the entire company HR, as she kept getting promoted to fill parental leaves.

I do know some women that are really trying to educate younger women to take more interest in finances because of the outsized affect it can have on your life later.

This should happen more, but I don't think gender should matter at all. Learn from any source.