It goes way beyond teenage trends.
When I was at school (80s mostly) girls had a mix of short and long hair, except long hair then was shoulder length. I always had very short hair - no one asked if I was a boy. I remember one girl having very long hair (similar length that most girls have now) and this was considered quite weird at the time.
When my son started school a few girls had short to shoulder length hair, most had just below shoulder, a few very long hair.
Fast forward to my youngest starting school 10 years ago and pretty much all girls had very long hair, very little variety, just lots of long long hair from a very young age. The few exceptions (interestingly all autistic girls) are now trans.
This is not fashion. 4 and 5 year olds are generally what their parents have made them.
Now in school children are confused if girls have short hair or boys have long hair.
In secondary school it gets worse, having been created by parents to adhere to these strict standards the children now put pressure on each other to conform, and conformity is far more present now than it was 40 years ago. I have a great many examples that show this.
A girl made to match her sisters with their long hair and pink clothes whatever the activity, decided at 10 that she was trans - was finally allowed to have short hair and wear practical clothes that suited her rough tough activities. Desisted at 18 (thankfully her parents refused puberty blockers so she’s not sterile) and realised she is a lesbian and doesn’t fit the stereotypes foisted on her from all angles since birth.
Similarly a gay young man who went through school bullied until he said he was trans because the other boys didn’t understand his long hair and love of occasionally wearing makeup. So he told them he was trans (he wasn’t) and everyone backed off.
Wait until you hear about the ex CEO of a trans charity who publicly told the world that she transed her son because her husband was homophobic.
Not one single trans child story doesn’t rely on gender stereotypes. It’s no surprise that the regression into strict stereotypes has resulted in a storm of trans children. It’s so obvious.
The 80s in comparison were so free. Children, teenagers and adults were more able to express themselves without having to conform. I can’t believe that we’ve gone so far back.