I've found the female/nb developers that I've encountered tend to be extremely talented/above average developers, so I don't think this is as much of an issue a

I've found the female/nb developers that I've encountered tend to be extremely talented/above average developers, so I don't think this is as much of an issue as you think. I suspect it has something to do with the people willing to navigate what is generally a field somewhat hostile to women and gender non-conforming people being particularly interested in the field and dedicated to working hard in it.