https://www.psychologytoday.com/blog/the-scientific-fundamentalist/201101/women-are-more-beautiful-men

If beautiful parents are more likely to have daughters, and if physical attractiveness is heritable (such that beautiful parents beget beautiful children and ugly parents beget ugly children), then it logically follows that, over many generations in the course of human evolution, the average level of physical attractiveness among women should gradually increase and the average level of physical attractiveness among men should gradually decrease. No matter what the initial sex difference in physical attractiveness (whether men were more attractive than women, women were more attractive than men, or there were no sex differences in physical attractiveness), given long enough time, the outcome should be that women are on average more physically attractive than men are.

Earlier studies indeed show that women are on average physically more attractive than men both in Japan and in the United States

Thoughts?