Using GUI.BeginGroup inside GUILayout.BeginScrollView doesn't trigger the scrollbar. Why?

Hi, I'm trying to create a scroll list of items which user can delete. By swiping left on mobile, the delete icon will appear as the item slide to the right. Since I can't move GUILayout.Buttons x position, seems like I can only use GUI.BeginGroup.

Problem is GUI.BeginGroup doesn't trigger the scrollbar to appear when the item lists exceeds the scrollheight. God, I hope i'm making sense.

heres my sample code - this method shows the scrollbar

 void OnGUI ()
 {
         GUILayout.BeginArea (areaRect);
         GUI.skin = skin;
         
         scrollPosition = GUILayout.BeginScrollView (scrollPosition, 
             GUILayout.Width (scrollRect.width), GUILayout.Height (scrollRect.height));
        
         for (int i =0; i<=numRows; i++) {                        
             GUILayout.Button ("acctdesc", GUILayout.Height (rowRect.height));                        
             GUILayout.Label ("pymtamt", outCol);
             GUILayout.Label ("pymtdesc", pymtDescCol);            
         }
         
         GUILayout.EndScrollView ();            
           GUILayout.EndArea ();
 }

then after I tried to implement GUI.BeginGroup, the scrollbar doesn't appear. What am I doing wrong?

 void OnGUI ()
 {
         GUILayout.BeginArea (areaRect);
         GUI.skin = skin;
         
         scrollPosition = GUI.BeginScrollView (new Rect(0,0,200,300),
              scrollPosition, new Rect(10,10,190,290));        
 
         for (int i =0; i<=numRows; i++) {           
             GUI.BeginGroup(new Rect(0, 50 * i, 190, 40));
             GUI.Label (new Rect(4,4,190,20), "acctdesc");    
             GUI.Label (new Rect(4,25,190,20), "pymtamt");    
             GUI.Label (new Rect(4,45,190,20), "pymtdesc");        
             GUI.EndGroup();            
         }
 
         GUI.EndScrollView ();            
         GUILayout.EndArea ();
 }