Regarding the women's national soccer team, yes, they are paid significantly less than their male counterparts, but not due to gender discrimination. Rather, it simply has to do with entertainment value. According to the YouTube channel MarketMaestro, in the world of athletics, athletes are entertainers at their core, and for soccer, the discrepancy between men and women is due to the "level of competition on the field" (2:11). People are more willing to pay money to witness great talent, and the same goes in this situation. Men's sports, such as the NBA, and men's soccer have greater coverage and attendance due to the bigger talent pool than women's sports. In addition, since the first women's FIFA World Cup occurred as recently as 1991, the global recognition and talent pool for women's soccer is very low.
Another reason why women are paid less is due to the benefits they receive. Comparing the contracts that the women and men receive, the men's soccer team receives only base pay from the USSF, while they get benefits from other soccer leagues. For the women's team, they receive extensive benefits from the USSF, such as severance pay and pregnancy pay. Benefits like these have to be held afloat by money and, as a result, much of the original base pay, equal to the men, is allocated towards the benefits, and the leftover money is given to them as base pay (Nate The Lawyer, YouTube).
It is possible that the $15 an hour worker is overpaid compared to the million dollar a week soccer player due to the quality of labor supplied. In some sectors of the labor force, higher wages provide a perverse incentive for some workers to free-ride off of others who work harder than them, resulting in a bigger pool of free-riders within the labor market. In the realm of soccer or athletics in general, employment is based off of athleticism, aka merit and skill. As such, their skills equate to the amount that they're being paid.
References
MarketMaestro. (2019, July 11). Why it's impossible to give the Uswnt equal pay | explained. YouTube. Retrieved October 9, 2021, from https://www.youtube.com/watch?v=hDHdrZ93-rE&t=200s.
Nate The Lawyer. (2021, March 28). US Women's soccer equal pay claims vs facts. court says they got paid more than the men. 😲. YouTube. Retrieved October 9, 2021, from https://www.youtube.com/watch?v=LLeAWuRbObQ.