I've struggled with this, because most agents I've been researching say they're particularly interested in fantasy with protagonists who come from underrepresented groups, cultures or perspectives, and my "dripping with voice but unburdened by world building details because it focuses on setting up the central conflict" query hasn't been doing too well (after its promising start last Jan).
The problem is, my fantasy takes place within a made-up world, and while my three main characters are each of a different race or culture within that world, and each that physically resembles races from our world, their cultures aren't based closely on anything from our world. So I can't just say, "TITLE is an X word fantasy novel set in a culture inspired by THIS RARELY SEEN IN FANTASY CIVILIZATION/HISTORICAL PERIOD" the way so many of the successful query letters I've seen lately on QT seem to.
But since non-European settings are also on wish lists, I'm reworking mine to sneak in hints, at least, that my settings isn't just "Ye Olde Fake Medieval England" either. The country where most of the world takes place is a matriarchy, they have "black powder" weapons, and the protagonist is the mixed-race son of a refugee. These things aren't the central conflict, but they're part of who the characters are, and they do come into the story as a complicating factor.
It's tough with sexual orientation, though, because the easiest way to slip it in is to mention a romantic relationship, and if there aren't any in the story, or if they're totally not a plot point you'd mention if the character were straight, then it feels awkward. And if being gay isn't a big deal or source of conflict at all, that's really cool and what some people want to see more of.
Would it work to simply mention it somewhere else in the query letter?
NAME is an X-word fantasy novel... It should appeal to fans of novels like [EXAMPLE] with LGBTQ protagonists who don't die or suffer other horrific hardships because of their orientation.
Or something like that?