Actually, watched the newest film a week or so ago. Wasn’t a great movie, but it was PRETTY clear that Dumbledore and Grindelwald had a relationship. NOT MAJOR SPOILERS AHEAD
There are like 3 or 4 flashbacks of them in slo-mo touching each other softly, entwining arms together, close up on skin, etc. At one point, some characters are talking to Dumbledore about his relationship with Grindelwald, saying something like “We know this is hard for you, since you were like brothers.” and Dumbledore looks wistful for a second, they flash back to show the young men touching and holding hands, looking into each others eyes in a dark room, Jude Law smiles softly and says “We were much more than brothers”, though maybe sans the word “much”. And this was not the only scene to this effect. One of the physical MacGuffins in the film is literally a love token between them.
Yeah - it was pretty heavily implied in the film that they had something going on.
