Ctrl Numpad 0
Ctrl+Numpad 0 sets an object as an active camera, but is not intended to change the point of view itself.
In order to view from the active camera, just press Numpad 0
Numpad 0 or click "3D Viewporton the 3D Viewport's menu choose View> Viewpoint > ViewCamera.
Or select View > ViewpointCameras > Camera.Active Camera