The real issue is real life is NOT friendly to teenagers. Theres few activities they can just go off and do on their own. A lot of places ban any unsupervised minors. My son can’t go to the escape room or several movie theaters without an adult.
Add to that helicopter parents over protective of kids, and kids reach to spaces they can feel more free: social media, gaming, etc
It happened to us. We let our kids stay in the car, during COVID, while we quickly shopped.
After we got home, the cops showed up and told us someone reported us for neglecting our kids. My wife just kept asking "did we do anything illegal?" and finally they admitted that no, we didn't. They just said
"it just doesn't look good, with all the crime out there".
I said "what crime?". Then they had to admit that crime is way down over the last 30 years, and is especially low in our area.
They eventually left, but it has a chilling effect on letting our kids be kids for fear that it will happen again.
I'm curious largely if many teens these days just don't want to go out or like you mentioned, aren't able to. Maybe it's a combo of both.
Just tough for me to imagine being a teen and not wanting to be as far as possible from parents.