In 2016 the Australian women’s national football team, the “Walltzing Matildas” were beaten 7-0 by a team of 15-year-old boys. The game was stopped early to prevent further humiliation. At the time the Waltzing Matildas were ranked fifth in the world.
https://www.stuff.co.nz/sport/footba...in-no-surprise
Women are as strong and fast as 13/14-year-old boys. That will never change. So to answer your question the Wales women’s team would be playing with pubescent boys if they played the men’s game.