Developes of adult game make blog posts all the time. They appear in https://itch.io/feed?filter=posts
I guess unattached blog posts might be filtered, at least I hope so. Maybe they now filter posts for nsfw marked developers. I do not know.
The bigger problem of those posts is all the fake posts that link to malware. You can't even scroll two pages without seeing them. I counted roughly. Over 30 of the last 50 "published a post" posts were malware .
The adult games you see are attached blog posts, or better named: devlogs/updates and such.