Yeah, the tagging problem is real in this case. Literally the only way to reliably find games about lesbians is by searching manually for recommendations. The tags, for both flavors of gay, are completely useless in filtering out hetero content. Gay male games seem to scrape by by appealing to the furry demographic, which is an overwhelmingly MM community with plenty of cash to burn on MM-targeted furry content via patreon. That's why the 'gay monsters' niche is overwhelmingly dominated by furry bears, and if you want soft boy incubi you can gtfo. They're a niche demographic, but way more dedicated than anything lesbians have, unfortunately. It's not like there's a secret cabal of gay women dedicated and willing to splurge cash for years on gay monster girls or something (if only) :/
But hey, the tags have been crap since long before I joined up. There's literally only one foot-related tag, for example, so it's the same problem for anyone who likes feet (and not just 'one footjob scene in the entire game'). Other fetishes/orientations are probably much the same. I... suspect that puts a lot of otherwise dedicated users off, at least on this site. It's not exactly welcoming to devs, either, knowing their gay-only game will be buried under a pile of unrelated het content, where it will likely only gain traction by word of mouth.
My $.02 on this.