For supporting nested types, i.e. a QML type having a list of many other user registered QML types, the QQmlListProperty has to be supported with a clever way to handle to static member functions of it. The support for QQmlListProperty corresponds to ListProperty in PySide6. This enables us to write code like:

 
Box

Widget { text: "B" }
Widget { text: "C" }
}
where Box and Widget are both registered QML types through bridge_type().