Because it's a demo that's
supposed to have a 190 XP cap which would mean you don't unlock any of the vibrators (or like 95% of the items advertised in the final game).
I'm not sure why there's a non-insignificant number of people who are installing what's essentially hacks or borrowing a save file generated using said hacks to circumvent the demo restrictions, and then getting surprised when the restricted content isn't present
It's an early release demo. You should be treating it like it's an unfinished product (because it is). I'd be more surprised by the fact that most of the mechanical stuff like the drone missions [mostly] even works in this demo build instead of shit you're not meant to access being missing if I were y'all.