I'm a male hetero and I've been playing female characters for half of my life now, I don't usually insist on romancing all / any character but I like the fact that if one character seems nice, I can try it. I say "character" as a habit but their personality must be really awesome for me to like them despite being a male.
now, what I understood from the setting was that in a world where there are dwarves, elfs, lizard and cat people, with a vast variety of skin color, the notion of same sex relationship or not was just a non-issue.
maybe it is just wishful thinking since I have been wishing for our society to move past these considerations for years, representing the full spectrum of orientations as normal in any fictional world we create or help create is something we can do to try and push the change but I get that in the meantime, this might indeed feel like missed opportunity.
to put things on perspective, when d&d started, female characters could only go as far as 15 in strength. now, tasha's cauldron of everything is suggesting to drop the racial stereotypes too. we don't need to bring what we don't like to our made up worlds.
as for the playersexual thing, yeah, it would definitely not hurt to have a baseline preference from the followers and them requiring a bit more "work" in order to convince them to see us as a romance target, with potentially an initial rejection and then the character coming back after some time passed...