After much testing and debugging I finally managed to figure out the problem.
As far as I can tell, the way this game is structured is as following:
1. a base game that is censored
2. a DLC that decensors it and adds 18+ content
The download bundles both of those together.
When you run it, it appears to load the censored base game, which then loads the DLC.
My system was failing to load the decensoring DLC and the game did not report any errors.
Thus I was simply playing the censored base game only.
There is no clear in game indication of which DLCs, if any, are loaded.
(aside from the fact that when playing it all the adult content is gone).
My OS is linux.
To open RPGM games I am using this special tool that is specifically designed to run RPGM games on linux:
https://f95zone.to/threads/rpg-maker-mv-mz-for-linux-cicpoffs-mount.198610/
using it runs the base game flawlessly. but then silently fails to load the decensoring DLC.
Using a different tool instead:
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It is able to load the DLC successfully. Giving you the decensored experience.
(although be advised that it introduced significant lag to opening the save menu in RPGM games. roughly 2 seconds per savefile. so you probably want to manually store your backup saves elsewhere and only keep a single savefile in the actual game save folder)
I apologize for the misinformation from earlier.
I would also like to suggest a dev note on OP that explains that the decensoring patch is bundled, but will fail to load when using rpg-maker-mv-mz-for-linux-cicpoffs-mount to run it. While working on bottles.