Instantiate prefab with its component c#

Im instantiating a prefab Sprite which containt Transform and Sprite Renderer components. But my instantiated objects doesnt have Sprite Renderer component. The main question - why?

Here is my code:

     void Start () {
         int cell = 1;
         GameObject dot = new GameObject("dot");
 
         for(int y = 0; y <= 3; y++)
             for(int x = 0; x <= 3; x++)
             {
                 Vector3 pos = new Vector3 (x, y, 0) * cell;
                 Instantiate(dot, pos, Quaternion.identity);
             }
     }