Huh, the backstory for one of my characters is that she's lesbian but got isekaied to a dating sim world where everyone is straight. She eventually gets out and joins up with other isekai protagonists, and those experiences with everyone going on and on about true love influence some of her decisions.
Of course, it's all backstory only, and she shows up at like chapter 43, but she has a really nice character arc.
Story in my signature if any of you are interested
. Only warning is that the first 30 chapters are mainly full of symbolism and setup, but if you like those (which many do) then it gets even better!