UnityActions aren't rendering. Not even with DrawWithUnity. Using SerializedMonoBehaviour renders just a null list selector. The original UnityAction renderer is a full gameobject method selector.
How can we reproduce it?
Just add a class with a public UnityAction.
What version of Unity are you using?
What version of Odin are you using? (See "Window > Odin Inspector > About")
What operating system are you on?
Window 7 64bit