It definitely seems to be the case in
very long races. I read that it is because women have smaller hearts, lungs and muscles than men; in shorter races men's higher power usually wins, but in
very long events the extra energy cost of running bigger hearts, lungs and muscles works against men.
In 1967, cyclist Beryl Burton set a new 12-hour time trial record of 277.25 miles. It exceeded the men's record by 0.73 miles and was not beaten by a man until 1969.
https://en.wikipedia.org/wiki/Beryl_Burton