Inspector can't find field of ScriptableObject

I'm having trouble showing a public field of a ScriptableObject which is a child of the component I'm inspecting. While I can easily do this in another way, I need this method to work for other variables. (ReorderableLists)

I simplified the problem, maybe I was just doing something obvious wrong, but I can't see what I'm doing wrong.

 class SomeComponent : MonoBehaviour{
     public MyScriptable scriptable; //instantiated and saved as asset
 }
 
 [Serializable] class MyScriptable : ScriptableObject{
     [SerializeField] public float value = 0.1f;
 }
 
 [CustomEditor(typeof(SomeComponent))] class SomeComponentEditor : Editor{
     public override void OnInspectorGUI() {
 
         if((target as SomeComponent).scriptable==null) (target as SomeComponent).scriptable = ScriptableObject.CreateInstance(typeof(MyScriptable)) as MyScriptable;
         
         EditorGUILayout.PropertyField(serializedObject.FindProperty("scriptable"));                                 
         //shows the asset
         EditorGUILayout.PropertyField(serializedObject.FindProperty("scriptable").FindPropertyRelative("value"));   
         //error
     }
 }