It would be very very impressive if your CNC machine can produce and assemble electric motors, wiring and circuit boards from raw materials. But then it would not be a CNC machine anymore.
Sure it could. A 5 axis CNC head could mill out the shape for a motor and be given a tool that spools out wire… It wouldn’t be easy, but it could build a motor with just that
It could also be given a head to solder circuit boards
CNC (computer numerical control) refers to the control systems rather than the act of milling materials, a 3D printer is a sub category of CNC. They can even use the same control boards.
You also usually process materials before putting them in - they’re good at detail work, but if you start with a block of steel you’re going to lose a fortune changing out expensive heads (and take forever). So it’s fair to assume you’re not using raw materials
