Scents from the "everyday luxuries" line have been popular in our local middle school. They are dupes of designer fragrances. Honestly, I would check out what scents are trending on TikTok and go with that. Or go with a bunch of travel sizes in various scents so they can mix and match to make their own blend.
My granddaughter is 16 and loves Vanilla scents. I usually get it at Victorias Secret as there is one there, she prefers but Vanilla seems to be favorite for her and her friends.