When I was a teenager, there were punks, goths, cyber goths, emo's, scene kids, chavs, fuck bois in jeans, leather jackets, and trainers, posh kids, nerds, geeks, the popular kids who knew and got on with everyone, etc. Chav males wore a lot of pink, scene kid fellas would spend hours on hair, make up and selfies. Etc.
All these "tribes" had both gay and bi teens, many had really a really androgynous/unisex style, but there were few "trans" as we think of it today. Plenty of blossoming fetishes all around though, and what we'd have called "trannies" (who knew they were male, and had penises, and liked using them).
Now I look at teenagers sometimes and it seems like they're either wearing the girls uniform of high waisted jeans, crop top, white trainers, big lips and eyelashes, or the boys uniform of cropped/faded hair, jeans and shorts, t-shirt, dark coloured sports jacket and trainers.