parent: Overlay.overlay

did not work in the first place. I am not exactly sure what finally did the trick but it might have been placing the InputPanel as a direct child to the Window (and thus making it a sibling - not a child - to contentItem). Works now.

Thanks so much
Felix

In my case using InputPanel explicitly. InputPanel is not a child of the Popup, but if I understand right it is a Singleton anyway. Any ideas?

There are no Singletons involved.

Popups are children of an "overlay item" (see https://doc.qt.io/qt-6/qml-qtquick-controls-overlay.html) which has a very high z-value. So, you must:

• Make your keyboard a sibling of that overlay item, AND
• Give your keyboard a higher z-value than that overlay item

Try this:

InputPanel {
    parent: Overlay.overlay.parent // Make the keyboard a sibling of the overlay
    z: Overlay.overlay.z + 1 // Give the keyboard a higher z-value than the overlay
    // ...
}