Why cannot see the mesh after add a staticmeshcomponent to Playercontroller? [4-27,etc.]

why cannot see the mesh after add a staticmeshcomponent to Playercontroller?Is there any on-off to let mesh show in the world? Engine Version:4.27

The Player Controller is a non-physical actor.
Why are we attempting to add a Static Mesh Component to a player controller?

Thanks for your answer.So there is no way to make it happen,right?

There is, the parent class is hidden by default: