FindObjectsOfType not find all objects and code not do anything

Why this code not work ? When i look Inspector it took only Five Objects and that objects not deactive himself. I added my Yoket script to all my objects and activate IEnumerator from another script. (No Error)

 private Yoket[] platformList;
             public IEnumerator RestartGameCo()
             {
                 platformList = FindObjectsOfType<Yoket> ();
         
                 for(int i = 0; i < platformList.Length; i++)
                 {
                     platformList[i].gameObject.SetActive (false);
                 }
             }