Have Muluna with my K2SO.
The recipes using crushed stone are not selectable on any crafting device.
Didnt see anything in the mod settings, options, etc that would lead me to believe I disabled them.
It isnt game or progression breaking, but does cause a bit of a bottlekneck.
They show up in the factoriopedia, but not on the crafting machine options.
I dont think they are tied to a research, at least I couldnt find it and will feel really dumb if this is the case.