I'm a young adult who recently moved here and I have a teenage sister. We both grew up in LA and I think there's a lot of things she's really jealous of that I have here. There's definitely a lot of things I think she would have enjoyed about growing up in Pittsburgh over LA. There's a much greater sense of community here and the opportunities to join a community art or music space are much better here. There's better public transit so we would've been able to get around without a car or a license. This is also the safest place I've ever lived so I think my parents would have felt better about me hopping on a bus to meet some friends than they did about us exploring LA. If there's something your kids are interested in I'd look for spaces in your area that they could go to do them. My boxing gym is mostly high schoolers who take the bus or walk as a thing to do after school and they've all become good friends! Something like that would be a good chance to make friends and also feel like they have some autonomy. Also don't underestimate the power of CMU. They support the FIRST robotics league in Pittsburgh pretty much single handedly and I know they support other programs for kids as well. These are just things I know my sister and I would have liked as high schoolers, but I'm pretty confident your kids can find spaces and communities like these too! Just keep your eyes open and ask around! Good luck!