Personally, given the history of queer repression, I don't think queerbaiting when it comes from people like Harry Styles or Jade is a bad thing.
Like, who they actually fuck and how they actually think about their gender (which is really the piece of missing information up for debate in queerbating conversations) is basically, pretty much, irrelevant. The fact is that they can openly question and explore and say "actually I'm not sure I am normative". That's something we should celebrate, given men like Alan Turing and Oscar Wilde were treated as criminals for homosexuality, and women like Janis Ian were blacklisted in industries (fuck Bill Cosby) for the merest hint of lesbianism (she didn't even know she was gay at the time).
It's not new. It's not new at all. David Bowie was very open about his bisexuality, as was Freddie Mercury. Harry Styles isn't a trailblazer for what he's doing, not like Boy George or Elton John, but then I'm not sure that people are really pretending he is.
I often fear conversations about queerbaiting veer into biphobia, just for comments like:
Bisexuals end up dating more people of the opposite gender than they do the same gender because less people are homosexual than are afflicted by heterosexuality. Sure, we can have a conversation about how people who haven't been in homosexual relationships have not got certain experiences that those who have do, but to question identity beyond that is rude.
I suppose you can make a point of it being a way to deepen parasocial relationships with audiences: a (today) low stakes way to offer information about ones private life, but then should we not celebrate that it is now low stakes? Treat it with a "ok cool" and move on? It's no different, really, than Taylor Swift talking about her cats.
So no. There is no problem with Jade talking about being queer. If she says she's a queer girly, for all intents and purposes she's a queer girly. She has far worse things about her to criticise.