Non-monobehavior editor script subscribing to delegate event and persisting on application reload

I am currently working on an editor tool and I have a DataManager class that holds a bunch of DataObjects. The manager needs to subscribe to a static DataChangeEvent delegate, w$$anonymous$$ch I do in the constructor.

However, I need the event subscription to remain even when Unity is quit and relaunched. Since t$$anonymous$$s isn't a monobehavior and I don't have OnEnable and OnDisable and my thought is that since the DataManager is serialized but the event is static, the subscription will be forgotten on next application load. I'm unable to [InitializeOnLoad] as the Manager holds a bunch of data objects.

Am I missing somet$$anonymous$$ng?

The alternative I'm considering is to use a scriptable object singleton with a Serialized List of DataManager's Actions so I can use the ScriptableObject's OnEnable to subscribe them at Unity launch.

Thanks in advance.

 // pseudo code
 public static class EventHandler
 {
     public delegate void OnDataChange(DataObject dataObject);
     public static event OnDataChange DataChangeEvent;
 }

 [Serializable]
 public class DataManager
 {
     [SerializeReference] public List<SomeDataObject> someDataObjects;

     public DataManager()
     {
         EventHandler.DataChangeEvent += OnChange;
     }
 
     public void OnDestroy() // Called by a parent class if needed
     {
         EventHandler.DataChangeEvent -= OnChange;
     }
 
     public void OnChange() 
     {
          // Some Logic
      }
 }