Loading Particular UI from Different Scene

How would you access the Options/Settings Menu from an in-game Pause Menu? I understand loading the different scene on the button click, but the scene I load (via loadscene) opens with my Main Menu UI. I want to load the Options/Settings UI when I load the Main Menu scene. I think just loading the Main Menu scene, then deactivating the Main Menu UI gameObject and activating the Options/Settings UI gameObject would be sufficient, but it only loads the Main Menu UI on scene change.

Here is my code for the button click (for loading the Options/Settings Menu UI):

 public enum GameOverStates
 {
     Main,
     Store,
 };

 public GameOverStates currentState;

 public GameObject mainMenu;
 public GameObject storeMenu;


 void Update()
 {
     switch (currentState)
     {
         case GameOverStates.Store:

             mainMenu.SetActive(false);
             storeMenu.SetActive(true);

             break;
     }
 }


    // Switch to Store Menu
 public void OnStore()
 {
     UnityEngine.Debug.Log("The fucking store");

     //Change menu state
     Loader.Load(Loader.Scene.MainMenu);
     currentState = GameOverStates.Store;

     ////Play sound effect
     SoundManager.PlaySound(SoundManager.Sound.ButtonClick);
 }

Thank for you any help :)