From googling for a few min, I found some interesting stuff; For example, women were not allowed to compete in Boston marathon until 1970s [0]. And times within the some groups of runners, since women began competing, is displaying a trend that men vs women times are getting closer (same article).
So this begs the question: since women haven’t been allowed to compete in sports for thousands of years, what will happen to their bodies when they are allowed to compete? In other words, on a long enough time scale, I believe that certain sports will have equal competition (running is one).
There are also clear cases and valid reasons for men being stronger/more fit but the main culprits, in at least endurance sports, is total body fat and hemoglobin [1]. I’m not 100% certain these factors cannot, over time, be diluted into equilibrium.
I’m not a scientist and don’t study such things but my guess is that male dominance won’t always be as pronounced as some folks think. One totally unscientific reason for my hypothesis is that there are just too many edge cases in sports that proved people wrong. The most famous ones, I can think of are: sprinters shouldn’t run standing up (Bolt). NBA players not shooting Free Throws underhand (Berry).
[0]: https://www.outsideonline.com/2386436/are-women-closing-men-...
[1]: https://www.outsideonline.com/2336111/defining-upper-limits-...