Not sure I have any wisdom to impart but my 15 yr old DD has always loved PE and is taking PE GCSE. However there is only one GCSE class in her huge comp and out of 30 kids, only 9 are girls.
She's always loved her sport, particularly football which was a challenge when she was younger because it was a struggle to find girls football teams and she has always been shy and not wanted to join a boys team, which was often suggested when we couldn't find a team for her to join. I remember a boys team that she joined for a couple of weeks where none of the boys would pass the ball to her!
Thankfully we did find a girls team when she was around 8 yrs old and she's still with them. Encouragingly where there used to be 15-20 girls of different ages in those days, at training now there must be 50-60 girls of different ages which goes to show how far things have come.
Things that have discouraged DD over the years, particularly during early puberty were the onset of periods and the skin tight football kit - she still hates the fact that the shirts are clingy and fitted because she's never been a skinny minny and is v conscious of her body still.
At school she constantly moans that the PE teachers favour the boys and that all the examples during their theory lessons are about boys. Interestingly the girls do so much better in the theory that they are now being asked to tutor the boys to bring their standards up!!! Seems like girls are still being seen as a 'helpmate' !!!
She has a football assessment coming up at school and has to compete against the boys because there aren't enough girls who play football which has increased her anxiety.
She loves watching the women's football on TV and that has got much more coverage in recent years which is great, particularly for showing women who are muscular and strong rather than the Love Island type.
She would love to do PE A Level but has been discouraged by her teachers as she doesn't play for the county (she had a try out 5 years ago but was unsuccessful and struggles with her confidence so is reluctant to try again). I think it would be a real shame if this put her off as PE lessons are the highlight of her week.
Re a mother's role in showing the way, I would just say that I have a disability and have never been able to demonstrate any sporting ability for her. Over the years this had induced a considerable amount of guilt but I have tried to make up for it by all the hours spent in the car driving her all over the county for fixtures and training sessions at the local academy.
Not sure whether this contributes much to the debate but thought sharing my experience might help.
PS my younger DD is dance mad and loved doing this at school. They used to offer Dance GCSE which appealed to some girls who weren't keen on traditional sport Sadly they no longer offer it and I think this is a real shame. She's not at all pleased that this option has gone. Not sure whether it was down to funding or staffing, but I think dance can be a great alternative for those who aren't "sporty".