Why can't my anti-tank gun move?

Why can’t my anti-tank gun move? There is a driver position in the game, but after moving to this position, the gunner’s perspective is still there, but he cannot fire. Hasn’t the action of the anti-tank gun in the game been realized yet?

i dont think it has been fully implemented yet

In that case, they shouldn’t add this unfinished driver function to the game. I wasted a lot of time because of this damn driver position, just to hope it can move!