What are pre-teen and teen boys wearing these days? Hair Style too?

My son is 12 and in 7th grade and while he doesn't really care much about clothes yet, I'd prefer that his family and I not buy him anything that's ridiculously out of style. He likes hoodies which I doubt will ever go out of style, but what about pants? Joggers? Cargo? Jeans? (Skinny, Straight, Baggy, some other style I'm unaware of)?

He also has a slight bossing to his forehead that makes it look larger than it is, which he's super sensitive about. He has recently been combing his hair forward to cover it which looks ridiculous to me since it lays flat and hangs over his eyes, almost like a reversed slick back style (a slick forward?) ...but maybe that the style these days? I couldn't find an example pic online to share so unlikely. I know he'll be embarrassed of any drastic changes so any advice on how I can style it a bit to start?

I know the family will start reaching out soon about what clothes to buy him this Christmas so figured I'd get a head start, while also asking about the hair thing.

Thanks bromos!