Parents and others wondering whether their local schools have biological males playing girls sports, take note: There’s a map for that. The American Parents Coalition has launched an interactive map on its website showing “instances across the country where boys have been allowed to participate in girls sports and have access to private spaces such as locker rooms, bathrooms, and showers.” The “Attack on Girls’ Sports and Spaces” map links to reports of athletes in high school and collegiate sports playing on female teams based on gender identity rather than sex. Alleigh Marre, the coalition’s president, said that the goal...