p  ~/samples/2024/pyside2709/main.py 
Python 3.10.12
Qt 6.7.2 (x86_64-little_endian-lp64 shared (dynamic) debug build; by GCC 11.4.0) [Python limited API 3.10.12]

 qmlRegisterType legacy: uri= pyside2709 qmlName= BaseClass
qmlRegisterType o= PyObject(type: "Shiboken.ObjectType") PyObject(type: "Shiboken.ObjectType") "pyside2709" v= 1 0 TypeRevision= 1.0
metaObject =0x55d8f460ed00 "BaseClass"    inherits QObject
  classInfo #0 QML.Element, BaseClass
  property #1 text, QString

QMetaType:  QMetaType(BaseClass*) "BaseClass*" 24 bytes listId= QMetaType(QQmlListProperty<BaseClass>)
no qmlTypeInfo())
attachedInfo= false extended= false
QmlParserStatus= false QmlPropertyValueSource= false
qmlRegisterType returns qmlTypeId= 0 


 qmlRegisterType legacy: uri= pyside2709 qmlName= ChildClass
qmlRegisterType o= PyObject(type: "Shiboken.ObjectType") PyObject(type: "Shiboken.ObjectType") "pyside2709" v= 1 0 TypeRevision= 1.0
metaObject =0x55d8f4611d50 "ChildClass"    inherits BaseClass    inherits QObject
  classInfo #0 QML.Element, ChildClass

QMetaType:  QMetaType(ChildClass*) "ChildClass*" 24 bytes listId= QMetaType(QQmlListProperty<ChildClass>)
no qmlTypeInfo())
attachedInfo= false extended= false
QmlParserStatus= false QmlPropertyValueSource= false
qmlRegisterType returns qmlTypeId= 1 

Context.__init__ <__main__.Context(0x55d8f4684fb0) at 0x7f7bef306400>
BaseClass.__init__ <__main__.ChildClass(0x55d8f4685640) at 0x7f7bef306480>
ChildClass.__init__ <__main__.ChildClass(0x55d8f4685640) at 0x7f7bef306480>
BaseClass.__init__ <__main__.BaseClass(0x55d8f4685a30) at 0x7f7bef306500>
inherits= False
write Label_QMLTYPE_2_QML_4(0x55d8f46a75e0) "test" QVariant(QObject*, 0x55d8f4685640) QFlags(0x1|0x2)
value= ChildClass(0x55d8f4685640)
write cannot convert o= ChildClass(0x55d8f4685640) propMo= BaseClass BaseClass valMo= ChildClass ChildClass
slowWrite
handleWriteError QMetaType(QObject*) QMetaType(BaseClass*)
file:///home/fruser/samples/2024/pyside2709/MainWindow.qml:18: TypeError: Cannot read property 'text' of null
file:///home/fruser/samples/2024/pyside2709/MainWindow.qml:17:17: Unable to assign ChildClass to BaseClass

DECORATOR
=========

p ~/samples/2024/pyside2709_decorator/main.py

 qmlElementMacro decorator QmlElement typeName= "auto"
qmlRegisterType o= PyObject(type: "Shiboken.ObjectType") PyObject(type: "Shiboken.ObjectType") "pyside2709" v= 1 0 TypeRevision= 1.0
metaObject =0x55fc54c43fb0 "BaseClass"    inherits QObject
  classInfo #0 QML.Element, auto
  property #1 text, QString

QMetaType:  QMetaType(BaseClass*) "BaseClass*" 24 bytes listId= QMetaType(QQmlListProperty<BaseClass>)
no qmlTypeInfo())
attachedInfo= false extended= false
QmlParserStatus= false QmlPropertyValueSource= false
qmlRegisterType returns qmlTypeId= 0 


 qmlElementMacro decorator QmlElement typeName= "auto"
qmlRegisterType o= PyObject(type: "Shiboken.ObjectType") PyObject(type: "Shiboken.ObjectType") "pyside2709" v= 1 0 TypeRevision= 1.0
metaObject =0x55fc54f070b0 "ChildClass"    inherits BaseClass    inherits QObject
  classInfo #1 QML.Element, auto

QMetaType:  QMetaType(ChildClass*) "ChildClass*" 24 bytes listId= QMetaType(QQmlListProperty<ChildClass>)
no qmlTypeInfo())
attachedInfo= false extended= false
QmlParserStatus= false QmlPropertyValueSource= false
qmlRegisterType returns qmlTypeId= 1 

Python 3.10.12
Qt 6.7.2 (x86_64-little_endian-lp64 shared (dynamic) debug build; by GCC 11.4.0) [Python limited API 3.10.12]
Context.__init__ <__main__.Context(0x55fc54fe95c0) at 0x7fc8a616a380>
BaseClass.__init__ <__main__.ChildClass(0x55fc54fe9c50) at 0x7fc8a616a400>
ChildClass.__init__ <__main__.ChildClass(0x55fc54fe9c50) at 0x7fc8a616a400>
BaseClass.__init__ <__main__.BaseClass(0x55fc54fea040) at 0x7fc8a616a480>
inherits= True