Modify Array in Editor Window - 2020+

I am trying to make an array that I can modify by changing the elements in the array as well as adding and removing elements from the array.

So far from previous examples the code I have half works, I am able to add and remove elements to a array but I am unable to change the value of any element.

Here is my example code that is not fully working

 public class windowTest : EditorWindow
     {
         public GameObject[] gameObjects;
     
         [MenuItem("Tools/Test Window")]
         public static void DisplayWindow()
         {
             windowTest window = EditorWindow.GetWindow<windowTest>();
             window.Show();
         }
     
         private void OnGUI()
         {
             ScriptableObject target = this;
             SerializedObject so = new SerializedObject(target);
             SerializedProperty objectsProp = so.FindProperty("gameObjects");
     
             EditorGUILayout.PropertyField(objectsProp, true);
             so.ApplyModifiedProperties();
         }
     }

I am able to add and remove elements to the array in the window without the ApplyModifiedProperties() function and the function is returning false but I am not sure what I need to do to make the properties apply successfully

Replies are greatly appreciated