Set UI Image to render below Gameobject [Resolved]

Hi, is there a way to render a IU image below a normal gameobject prefab?

I have been looking at the forum and web but no luck.

I've tried setting the renderer layer to my Backgroud, but an error pops out saying:

 MissingComponentException: There is no 'Renderer' attached to the "BalloneFrame" game object, but a script is trying to access it.
 You probably need to add a Renderer to the game object "BalloneFrame". Or your script needs to check if the component is attached before using it

My code looks like:

     public string renderLayer;
     public int orderLayer;
     
     void Start () {    
         CanvasRenderer renderer = gameObject.GetComponent<CanvasRenderer> ();
         renderer.renderer.sortingLayerName = renderLayer;
         renderer.renderer.sortingOrder = orderLayer;
     }

I've try also with the UI.Image component.

Can someone please point me in the right direction.

Thanks in advance.