Tweens and crop tops

My 9 year old loves Korean Fashion and all things 90’s vibes. She’s recently been trying to choose shirts that are a little shorter than usual - which isn’t difficult- bc for some reason all girls clothes have gotten smaller and smaller. She’s reaching for the crop tops and baggy jeans. I feel torn about the tops that show a little belly and I think I’m going to get some plenty of mixed opinions bc I know parents that are non compromising and it’s a HARD no and some parents are totally for letting their kids express their fashion. On one hand I always said I wouldn’t let my child dress with crop tops or revealing tops, she still wears full one piece swimsuits. But on the other hand , I also feel like why should I have to filter an otherwise innocent fashion statement bc of the possibility of what other people may perceive.

I’m looking for respectful, thoughtful input on why or why not you let your daughters wear shirts that show their belly. I think each side has very very valid points, which is why I’m on the fence.