She's definitely the most trans-seeming of the major characters, in the same way that Lupin is the most gay-seeming and McGonagall is the most lesbian-seeming.
I would agree. I certainly always read Lupin that way. There's a lot of obvious queerness to Draco and it shows up in his son in The Cursed Child.
But, and again this is telling, 'everyone got married and had babies' to me was either a unintentional or deliberate 'f-ck you' to people's head canon. Weirdly pointless. It's sadly hard to tell now.
Retconning Dumbledore as a burnt and broken desexualised celibate gay man wasn't personally a helpful step. I don't think I believe her when she say's that was always her intention. I don't think there was malice there, it was just unfortunate.
But the sad truth is that we ended up with a series of books that ran well into the mid 00's with exclusively heterosexual characters and questionably token non white characters. And for someone with her background the 'comedic but lovable' working class parody of the Weasley's.
FWIW during my big move I gave my books away including two copies of the 'rare' UK one that goes for a few hundred a piece to charity. All that came were my old atlases and Pullman (please forever hold your peace Phillip)