component loaded but is not shown in window

[Mighty_Pig]

So I created my custom component and loaded it as a plugin. It is also constructed, since I get a qInfo() from the constructor. However, it does not show on the window.

As stated in the documentation, you should override the paint() function, which I did. However, it seems this is never called. When should this be called, and what could a reason be that it never is called?

My code looks as following:
mycustombuttonnew.qml(The plugin):

import QtQuick 6.6
import QtQuick.Controls
import QtQuick.Controls.Material

Item {
    id: button
    Material.background: Material.Red
    width: button.getWidth()
    height: button.getHeight()
    objectName: "MyCustomButton"
    Text {
                id: name
                text: button.name // Bind to the parent's text property
                color: "black"
                anchors.centerIn: button // Center text within the button
                objectName: "MyCustomButtonText"
            }
    MouseArea {
                id: mouseArea
                anchors.fill: button
                onClicked: {
                    button.buttonClicked()
                }
                objectName: "MyCustomButtonMouseArea"
            }
}

Then I include this custom component/plugin inside the mainwindow.qml:

import QtQuick 6.6

import plugins.MyCustomButtonNew
import QtQuick.Controls.Material

Window {
    visible: true
    Item {
        width: 1920; height: 1080
        objectName: "root item"

        MyCustomButtonNew {
            id: button
            Material.background: Material.Red
            name: "test"
            objectName: "MyCustomButton"

        }
    }
}

My main is as following:

int main(int argc, char *argv[])
{

    QApplication a(argc, argv);
    QQmlApplicationEngine engine;
    QWindow window;
    const QUrl url = QUrl::fromLocalFile("mainwindow.qml");
    QObject::connect(
        &engine,
        &QQmlApplicationEngine::objectCreated,
        &a,
        [url](QObject *obj, const QUrl &objUrl) {
            if (!obj && url == objUrl)
                QCoreApplication::exit(-1);
        },
        Qt::QueuedConnection);
    engine.load(url);
    QQuickView view = QQuickView(&engine, &window);
 view.setResizeMode(QQuickView::SizeRootObjectToView);
    view.show();
return a.exec();

Any help to make me understand this better would be appriciated :).

[GrecKo]

@Mighty_Pig What if you set a width and height on the Window?