Ok heres a question? How do you know there are no LGBT characters in this game?
What? You expect their entire identity, their entire theme to be around their sexual identity?
If you want too see that kind of thing, go watch any Netflix produced show were they literally have a bingo card of woke tropes right down too a single character whos only role is to walk up and say "im gay!" and walk off.
No OP, the fact you want to force that kind of thing as a characters sole plot point and reason for existing, makes you a total bigot.

Romance and gender politics doesn't feature heavily in FFXIV, let a fantasy game just stay a fantasy game and things progress naturally, if it happens, it happens and it will be in a way that fits the games theme, Hell as I said, its likely there are characters, they just don't scream it from the rooftop like you want, because that's just stupid, like EVERY topic in EVERY game demanding a character be made purely based on sexual identity.