Custom Editor script - List<> problem

Hi guys,
I've been struggling with t$$anonymous$$s for a couple of hours, but the Editor has me stumped.
I have a TutorialProcess class that I want to use to track progress through a Tutorial, with Button objects that trigger the completion of the Task.

 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.UI;
 
 [System.Serializable]
 public class TutorialProcess : MonoBehaviour
 {
     public List<TutTasks> Pages = new List<TutTasks>();
 
     [System.Serializable]
     public class TutTasks
     {
         public string detail;
         public bool completed;
         public Button trigger;
 
         public TutTasks(string Details)
         {
             detail = Details;
             completed = false;
             trigger = null;
         }
     }
 
     void Start()
     {
         Pages.Add(new TutTasks("Welcome to the Tutorial"));
     }
 }

My TutorialProcessEditor is also very simple:

 using UnityEditor;
 
 [CustomEditor(typeof(TutorialProcess)), CanEditMultipleObjects]
 public class TutorialProcessEditor : Editor
 {
     public override void OnInspectorGUI()
     {
         serializedObject.Update();
         EditorGUILayout.PropertyField(serializedObject.FindProperty("Pages"),true);
         serializedObject.ApplyModifiedProperties();
     }
 }

As you can see from the below screenshot, the data is not populating. I need to edit the tutorial text, AND drag in a Button as a trigger. I know the list is created correctly, and the new task is added at Start(), but its not showing in the Editor? Can anybody assist with getting t$$anonymous$$s to work properly?
If I could $$anonymous$$de the "Element n" for each row too thatd be cool. :)

Thanks