@denhaag, as a mother of a girl who has fought to take her place in football for 13 years, the girls have had to justify why they need kit that fits, equal access to pitch time and coaches. When they are on the pitch with boys, the boys behave badly, their own team often ignore them and when we had a girls team play in a 'mixed' (boys) league the behaviour of the opposition players, parents and coaches was nothing short of shocking.
While some girls may be better, faster, bigger, than some boys, aged between 6 and 10 - for the most part, the boys are better, faster and more aggressive than the girls. There are numerous reasons for this... not least the shoes and clothes that girls have to wear to school.
The point here is that girls are being expected to confirm to gender stereotypes and are being called out by adults when on other pitches, men who identify as women are protected by the footballing organisation, rules, policies etc and are being sanctioned significantly more harshly for asking if players are male, than male players have been for actual bodily harm (head butting) or racism.
For girls and women to play football, they have to over come so many more barriers than boys and men. The FA and football culture in the UK, is actively hostile towards women and girls, despite the huge popularity and success of women's football.
Interestingly, when my female presenting boy, was playing (he had a beautiful blond bob... ) - many people said how lovely it was that he played in the boys team.... but when my actual female child played in a mixed team - she was treated badly.