As a follow up to QTBUG-110315, I tried to assign the registered type to a property inside QML like

property list<Entry> entries: Foo.entries

prints

qt.core.qobject.connect: QObject::connect(QObject, QQmlDMObjectData): invalid nullptr parameter
qml: {"0":null}
qrc:/sandbox/main.qml:31: TypeError: Cannot read property 'status' of null

during runtime and prints

Error: main.qml:15:46: Could not compile binding for entries: cannot convert from QList<Entry*> of Foo::entries with type QList<Entry*> to QList<QObject *> of QList<QObject *>

plus the complete QML file during compilation.

Using

property var entries2: Foo.entries 

instead works and contains the entries (with the drawback that it does not know what "entries" is, actually.

We had that list assignment construct in one place only, and it is easily replaceable by the same thing in C++ here. Nevertheless the sequential container behaviour feels a bit inconsistent here.