Qt6: Warnings when QML Listview accesses C++ model

First of all, I'm new to Qt6 and QML, so maybe I am missing something obvious.

I'm trying to link a C++ model to a ListView in QML from a QObject property.
From this doc I should be able to use a List<QObject*> as a static model in a QML view.

However, in that example, the QList<QObject*> is passed directly to a QQuickView.
I would like to access the object list from a property of a QObject I can already access in QML.
But when I try to do that, nothing is shown in the list view, and I don't know what I am doing wrong...
Also, QML reports me a warning (see below my example code).

Here a working minimal example of what I am trying to achieve:

backend.h

#ifndef BACKEND_H#define BACKEND_H#include <QObject>// Contains the data I want to display for each elementclass Item : public QObject{    Q_OBJECT    Q_PROPERTY(QString name MEMBER m_name NOTIFY onNameChanged)public:    Item(QString name, QObject *parent = nullptr)        : QObject{parent}, m_name(name)    {}signals:    void onNameChanged();private:    QString m_name {"NULL"};};// This class contains the model I want to display.// The data will be loaded before loading the QML file.// It can be switched between a mockup and a real backend depending on the context.class Backend : public QObject{    Q_OBJECT    Q_PROPERTY(QString header MEMBER m_header NOTIFY onHeaderChanged)    Q_PROPERTY(QList<QObject*> model MEMBER m_model NOTIFY onModelChanged)public:    explicit Backend(QObject *parent = nullptr)        : QObject{parent}    {        m_header = "Cpp Backend";        m_model.append(new Item {"Cpp"});        m_model.append(new Item {"backend"});        m_model.append(new Item {"is"});        m_model.append(new Item {"great!"});    }    virtual ~Backend() override    {        for (QObject* item : m_model)            delete item;    }signals:    void onHeaderChanged();    void onModelChanged();private:    QString m_header;    QList<QObject*> m_model;};#endif // BACKEND_H

main.cpp

#include <QGuiApplication>#include <QQmlApplicationEngine>#include <QQMLContext>#include "backend.h"int main(int argc, char *argv[]){    QGuiApplication app(argc, argv);    QQmlApplicationEngine engine;    // Exposing the backend to QML with the name "cppBackend"    Backend backend;    engine.rootContext()->setContextProperty("cppBackend", &backend);    const QUrl url(u"qrc:/TestBackend/Main.qml"_qs);    QObject::connect(&engine,&QQmlApplicationEngine::objectCreationFailed,&app,        []() { QCoreApplication::exit(-1); },        Qt::QueuedConnection);    engine.load(url);    return app.exec();}

Main.qml

import QtQuickWindow {    width: 640    height: 480    visible: true    title: qsTr("Hello World")    ListModel {        id: mockupList        ListElement { name: "Hello" }        ListElement { name: "World!" }        ListElement { name: "How" }        ListElement { name: "are" }        ListElement { name: "you?" }    }    ListView {        id: listView        anchors.fill: parent        anchors.margins: 20        spacing: 10        orientation: ListView.Vertical        //model: mockupList // this works as expected        model: cppBackend.model // this doesn't show anything in the listview        delegate: Item {            id: myItem            required property string name            width: label.width            height: label.height            Text {                id: label                text: myItem.name                font.pointSize: 24            }        }        header: Text {            width: parent.width            horizontalAlignment: Text.AlignHCenter            font.pointSize: 48            font.bold: true            text: cppBackend.header // This works as expected        }    }}

When I use te mockupList instead of the C++ backend, the items are displayed as expected.
However, when using the cppBackend I'm getting this warning:

qrc:/TestBackend/Main.qml:30:13: Required property name was not initialized qrc:/TestBackend/Main.qml: 30

It seems that the property cppBackend.model is accessed, but the items inside do not provide access to their properties as it seems it should to be done in the Qt doc...