not really. cadquery started as a freecad workbench, but moved out a long while ago. So current cadquery isn't usable inside freecad (which is a shame).
also worth a look: build123d
I just learned about build123d from another comment here, very excited to try it out!
Yeah, I found it much more interesting when it was in FreeCAD --- wish there was some nice, graphical alternative (something like Grasshopper).