Lesbians have way less choices than gays tbh (yes, there are plenty of lesbian scenes in str8 games, but I wouldn't consider those fully, considering it's basically oriented towards a str8 fetish -might be good for a good fingering, but I kind of guess they'd like more
)
I wouldn't limit that to lesbians, it's more a matter of women having far less choices than men, whether they're straight or not.
Just like regular porn, adult games are mostly focused on the male experience. It took a long time for porn movies specifically made for women to come around and having watched a few of those, I'm not sure they really succeed in that regard.
There are plenty of games with female protagonists of course, but half of them are of the
female MC gets used and raped in various ways variety and even the more consensual ones seem to focus on the pleasure of men, not women.
And some well written games even manage to propose an 'equal representation' between str8 and gay content, like Spacecorps here, or Hornstown, just to mention a couple. I think the difficulty here is that, if there's only one writer, it's not easy to write believable and well put-together storylines for a sexual orientation you don't belong to.
I wish you wouldn't put Hornstown on that list.
While it may or may not provide 'equal representation' for straight and gay players (never tried to play it gay, so no idea), it fails to meet the standard in other ways. Last time I checked there were a lot of interesting and diverse options for submissives, while the content for dominants was very short, bland and underwhelming in every way.
Of course Spacecorps doesn't provide content for dominant players either, but it's harder to blame the dev given the initial setting and the fact that we haven't even made it out of the intro yet.