Move an object in world space on the viewport

I have a 3d object, that I am unsure how to move relative to the camera UI, from point 1 to point 2

I tried many things and searched everywhere with no luck. The closest (I think I got) was as below:

 void FixedUpdate()
     {
     
             Vector2 StartPosition = transform.position;                      
             Vector2 DestinationPosition = Camera.main.ScreenToWorldPoint(canvas_object_transform.transform.position); 
             
             
             transform.position = Vector3.MoveTowards(StartPosition, DestinationPosition, collectedMoveSpeed);
             
             
             
         }
     }

This is an illustration of what I mean: