Did you, I dunno... Look at the development log? It's literally right above the comments section. Last update was maybe a week before you made this post. You can learn a lot about games on Itch.io by just... reading the pages.
As for the missing content? They had some issues, and basically had to start from scratch.
https://monsterboxgames.itch.io/in-heat/devlog/518741/in-heat-checkup-sex-jumpsc...