Missing QtQuick Dialogs

Apparently the (legacy) QtQuick.Dialogs module has been removed together with the deprecated QuickControls 1. Unfortunately I cannot find a proper replacement or did I overlook something?

Specifically I am writing a little QtQuick/PySide6 "script-only" project targetting "classic" desktop. Unfortunately the FileDialog from "QtQuick.Labs.platform" module depends on QWidgets which produces the following runtime error:

ERROR: No native FileDialog implementation available.
Qt Labs Platform requires Qt Widgets on this setup.
Add 'QT += widgets' to .pro and create QApplication in main().

The following Python import does not work:

# note: QtWidgets is not directly used in Python code
from PySide6 import QtWidgets

Can I define the module dependency in "pyproject" explicitly as a workaround maybe?