PySide6 subclasses missing

# -*- coding: utf-8 -*-

# https://bugreports.qt.io/browse/PYSIDE-2898

_init = set(globals())
# uncomment one or more of the three following lines:
# from PySide6.QtCore import __spec__  # or whatever else
# from PySide6.QtGui import __spec__  # or whatever else
# from PySide6.QtWidgets import __spec__  # or whatever else

from PySide6.QtCore import *
from PySide6.QtGui import *
from PySide6.QtWidgets import *
_imported = set(globals()) - _init


def subclasses():
    import enum

    for class_name in _imported:
        if class_name[1].isupper() and isinstance((cls:=globals()[class_name]), type):
            for subclass_name in cls.__dict__:
                if subclass_name[0].isupper():
                    if isinstance((subclass:=getattr(cls, subclass_name)), type) and enum.Enum not in subclass.__mro__:
                        # print(class_name, subclass_name, sep='.')
                        yield class_name, subclass_name


print(sum(1 for _ in subclasses()), "subclasses found")
# list the classes
# print(*map('.'.join, subclasses()), sep='\n')