If it is FLAG football, then I have no problem with it.
Yep...our daughter plays flag football for her middle school team. She’s the only girl on the team. She’s also the biggest kid in her grade and has been taught how to play rough by her brothers - LOL. She has no interest in playing tackle football (which is a completely different game).
A lot of hard contact takes place even in flag football.
I have no problem with pre-puberty mixed sex tackle football. We played it all the time as kids.
Post puberty, a girl has no business competing in any contact sport with boys.