So while I was browsing the gfx games files to see if there's something new to add to the wiki I found the following new rooms, steamdb confirms they were added in the new update. Afterwards I searched them in all event and common files but they weren't present anywhere so I guess it's something the devs haven't yet implemented. Still if you want to use them for your custom empires you need only replace one line in your saved empires file, I added them to my guide here.
Gilded
Organic
Crystaline
Scrappy
Runic
Gilded
Organic
Crystaline
Scrappy
Runic