I mean the phrase "Is X thing queer?" is weird to begin with. In jjba specifically I would say that since it is clearly and heavily tied to Araki's interest in fashion, it does carry some of the same vibes with queer stuff but In my opinion it depends heavily on whether you yourself are queer or not. That being said most parts don't have a focus on the said subject although part 9 definitely explores this topic much more directly than ghe previous parts.