Trouble finding GameObject in a script that is on an Empty brought over from previous scene

So I have an empty that is holding scripts. This is initiated on the first level (menu) I then use DontDestroyOnLoad to bring it through to the next level as it has some script functions that need to be executed in that scene.

Where I am having the trouble is trying to find GameObjects in that next level.

 public void ClickStartSeq (){
 
         //Pulls in tracking data for each object
         GameObject PhoneTrack = GameObject.Find("PhoneData");
         Debug.Log(PhoneTrack);
         //PhoneTrackingData = PhoneTrack.GetComponent<CornerPinData3>();
 
         GameObject HelmetTrack = GameObject.Find("HelmetTrack");
         Debug.Log(HelmetTrack);
         //HelmetTrackingData = HelmetTrack.GetComponent<CornerPinData3>();
 
         GameObject JerseyTrack = GameObject.Find("JerseyTrack");
         Debug.Log(JerseyTrack);
         //JerseyTrackingData = JerseyTrack.GetComponent<CornerPinData3>();
 
         GameObject AutographTrack = GameObject.Find("AutographTrack");
         Debug.Log(AutographTrack);
         //AutographTrackingData = AutographTrack.GetComponent<CornerPinData3>();
 
         //GameObject TunnelTrack = GameObject.Find("TunnelTrack");
         //Debug.Log(PhoneTrack);
         //TunnelTrackingData = TunnelTrack.GetComponent<CornerPinData3>();
         
         
         GameObject VideoAudio = GameObject.Find("VIDEO");
         AudioSource audio = VideoAudio.GetComponent<AudioSource>();
            audio.Play();
         StartCoroutine(StartSeq()) ;

This method is called on a button click after the scene has loaded.

What is weird is that according to my Debug, the HelmetTrack and the AutographTrack are being found, where as the others are returning a null value.

Any ideas on what the issue is would be much appreciated!!