I used to run games at a local library. I found that basing the game off some fiction that they find interesting helps get them involved. They will have inside jokes, but in to the world, and know the lore without you having to preach it. Also, maybe change or simplify your system. Some kids love rolls, they live to roll dice. Others live for roleplay. Finding the right blend for your group is kinda important to keep them going. Try “plot point” style games instead of scripted. Start the session with a goal and knowledge of the area, present them with the goal, let them figure it out. An adventure with a ‘time clock’ can help that sometimes. “The longer your task takes, the more people in town die, these remedy ingredients are rare and only you can get them back in time.” Also realize the neurodivergence factor. They may not be actively interacting, but they can still be totally engaged. Hell, I’m typing this while watching a podcast. Sometimes my brain requires more stimulation to focus on something. It’s weird, I get it, as a parent of an AuDHD late teen it can be maddening sometimes. But when he comes back a few days later to talk about what I was talking at him about, it reminds me that he does listen, it just looks different. (I’m AuDHD as well, for reference) Good luck! If I can help, hit me up, I’ll try. Gaming with creative teens is honestly so much fun! They find so many ways to break the rules and skirt rules, finding ways to break your scripted adventure. Keeps you on your toes.