We don't always post both versions at the same time, as we tend to do testing on itch.io before posting content to steam. We have recently posted the beta on steam, however.
I found this post, and installed/played the beta on Steam — thank you very much. (I intend to get a VR set at some point, and wanted to get funding into support the game, so bought it quite a while back and left it sitting in my library)
Would it be worth adding a news post on Steam to mention the KBM beta, so that people ask this question less? The current news post just says that it's "coming".
Keep up the good work — looking forward to future updates!
(Perhaps we'll find that former intern, and claim the microchip from her forehead? A waiting room of 'volunteers' would provide ample opportunity for cameos or DLC...)