I think people don't understand well. This guy doesn't just fit the gay stereotypes. He's also in story assumed to be dating the other guy many times, even if that is only because he is mistaken as female (another bl trope anyways).
I don't think it'll go down the route of LGBT+ honestly. However, I can totally see why people would think it might. Especially considering we have two sets of very gay looking couples to ship between the main 4. I mean honestly, the main pair scream gay stereotypes.
But in the end, it's more or less a gender swap of the typical Shoujo characters. It just so happens to match similar vibes as in bl and gl. Haesol even said she doesn't have interest in the same gender.