Qt6 for Python (PySide6) on Windows 10: can't make QtQml and QtQuick work from QML

On my Windows 10 machine I'm trying few simple examples of new Qt6 and QML based example doesn't work for me.

I'm running Python 3.8.6 and a virtual env

python3 -m venv venv
.\venv\Scripts\Activate.ps1

The pyside6 installs without any warnings into the venv

pip install pyside6

and a non-QML hello world example using QApplication and QLabel runs fine (this one: https://doc.qt.io/qtforpython/tutorials/basictutorial/widgets.html )

What doesn't work is this example, taken from https://doc.qt.io/qtforpython/tutorials/basictutorial/qml.html :

main.py:

from PySide6.QtWidgets import QApplication
from PySide6.QtQuick import QQuickView
from PySide6.QtCore import QUrl

app = QApplication([])
view = QQuickView()
url = QUrl("view.qml")

view.setSource(url)
view.show()
app.exec_()

view.qml:

import QtQuick 2.0

Rectangle {
    width: 200
    height: 200
    color: "green"

    Text {
        text: "Hello World"
        anchors.centerIn: parent
    }
}

the messages I receive trying to run are:

file:///C:/github/aorcl/python-gui-2/view.qml:1:1: Cannot load library C:\github\aorcl\python-gui-2\venv\lib\site-packages\PySide6\qml\QtQml\WorkerScript\workerscriptplugin.dll: The specified module could not be found.
     import QtQuick
     ^
file:///C:/github/aorcl/python-gui-2/view.qml: Failed to load dependencies for module "QtQml" version 6.0
file:///C:/github/aorcl/python-gui-2/view.qml: Failed to load dependencies for module "QtQuick" version 6.0

I verified and the file isn't missing, it is there:

C:\github\aorcl\python-gui-2\venv\lib\site-packages\PySide6\qml\QtQml\WorkerScript\workerscriptplugin.dll

What else am I missing?