We will touch on that, but in our own way. I think the very traditional narratives of "coming to terms, coming out of the closet, suffering push back and overcoming it" are very overdone and not very engaging, so when we do it I want it to be different.
Khenbish's story may be the one that most visibly touches this subject. He comes from a very poor family that's been through a lot, and from a culture that's not had much contact with the idea of being tolerant of LGBT people. His family is loving, he loves his parents and siblings and wants to help them, which is why he's been hyper-focused on being the responsible older brother at the cost of his own self-exploration as an individual. It's also a factor that he really struggled to make connections with others because of his charm, and being openly LGBT often leads to people being fired over it in Mongolia.
Overall, Khenbish's life is affected by a homophobic culture, but it's first and foremost ruled by the very few chances he and his family have had to do well in life. So him coming to terms with his own sexuality will be a bit different from most LGBT narratives. It will be, I hope, quite unique, and maybe a bit subtle.
As for Oscar... I have a lot I'd like to touch with him. The Hinterlands sections happened mainly from P's perspective, so we didn't get to see much of Oscar's innermost thoughts. I'd like to change that in the future, hopefully explore how he sees his own sexuality.
He's someone who's been so thoroughly excluded from his community, and he is so aware of how destructive the Hinterlands are, that he sees everything that opposes their local culture as a positive thing. The standard sexuality for a man of the Hinterlands is "heterosexual chronic cheater" or, at most, "homophobic bisexual chronic cheater misogynist," so you can imagine that P's "monogamous gay who does not want to take advantage of him" is almost saint-like in comparison.
In that sense, Oscar doesn't struggle too much with accepting his sexuality, but if we see more of his inner monologue I want to convey that things are a little more complicated. He has a richer inner life than his attitude lets on, and that extends to the finer details of his sexuality. He's special like that.
Asterion doesn't struggle too much with being attracted to a man, instead he has to grapple with literally everything else, including but not limited to the MC's hierarchical position, frail mortality, and the profound existential dread of being unable to follow the natural cycle of life which all mortals do.
As an addendum, Asterion has seen plenty of LGBT people over the centuries, so homosexuality on its own is not something he bats an eye at.
Other characters may touch on this topic too, but more distantly and superficially. We will see.