They’re just not very prominent in the story so far. I like them though.
And to be clear, aside from really liking the part of the series thar has actually investigated her character, the thing that makes me happy is how she is forthrightly “I can only like women” gay, which I attribute to やがて君にやる being written like a more serious story than yuri I’m used to.
What I mean by that is, Japanese media has a tendency to go the route of “someone is fated for me, and by coincidence, that person is x gender” or the ever pervasive “if it’s you, it’s okay,” and try to side-step the actual issue of sexual orientation. There’s this feeling of “I’m normal with an exception” in a lot of this stuff.
Up until Sayaka’s situation got a deep-dive, there was every indication that 君になる was going to sidestep as well, with Yuu not really knowing what she likes at all, and Touko only liking Yuu because Yuu doesn’t like anyone (acting somewhat demisexual if anything).
So Sayaka being clearly a straight-up gold-star lesbian is a breath of fresh air in my Japanese media that I haven’t felt since 放浪息子)
Anyway I’ll stop derailing now~