QSGGeometry.vertexDataAsPoint2D() returns single point not list

Using the QSGGeometry.vertexDataAsPoint2D() function the return value is a QSGGeometry.Point2D type. However, it should be a list of mutable points. This bug makes it hard to create SceneGraph based QQuickItem from Python.

<PySide6.QtQuick.QSGGeometry.Point2D object at 0x7efdd11cfe40>
Traceback (most recent call last):
minmal.py", line 7, in <module>
 print(v[0])
TypeError: 'PySide6.QtQuick.QSGGeometry.Point2D' object is not subscriptable