Honestly I'd love for cosmere to have more gay characters, especially because the ones we do have aren't really at the forefront. For example, Shallan is technically an LGBT protagonist because she was confirmed by Brandon to be bisexual (if my memory serves me correct, i dont have a WoB about it on hand though) but functionally, she serves as straight because she has yet to have any real passing interest in anyone besides male characters (other than her debatable infatuation with Jasnah in WoK but I don't really think that counts because it wasn't INTENDED to be attraction to her) and I think it would be great to explore that more. Right now I don't know if any of the ongoing cosmere stories have much potential for a gay male protagonist though, but i would be open to it. I could see it very possibly that when Renarin has more of a focal point, he could be written to be gay alongside everything else, but I wouldn't bet on it because nothing has really hinted on it at the moment, which sucks. I think right now the character slated to be openly gay in stormlight beyond Drehy is probably Jassnah, as it's already been implied she doesn't really have a desire for a relationship with men. Therefore I think it'd be pretty likely her sexuality gets explored in the future. Idk, I have a good many personal headcanons on character sexuality but this is more talking about things that would actually be done in canon. (but feel free to ask me about my headcanons as well! I enjoy talking about them).