I am curious about the reason. I would like to know if it is planned to be applied in the future or if it is a part that is not supported due to the structure. (For example, the 3D object and the 2D object’s sprite are managed separately, so you can’t configure a parent - this is only my guess and example)
+update
I checked the Hierarchy of Sprite and TransformNode. They clearly inherited another parent object. What I want is a solution of Unity3D’s GameObject concept. Should I make this myself?