Question Camera Rotation in Unity Third Person Starter Asset for Mobile

when we try to use the virtual touch zone input in the third person starter asset, the "look" part doesn't allow to rotate the camera like a competitive shooter tps, instead it makes the camera continuously rotate, like we do in a gamepad right stick.

does anyone how how to get that right???
like...i want the camera system like PUBG Mobile....in which the user can rotate camera using touch and the camera rotates only when the user is moving the finger and not while it is stopped'