SafeArea margins not populated

This behavior has been observed on 6.9.0 RC, downloaded from Qt Maintenance Tool, and also upstream Qt pulled on 27.03.2025.

When running the minimal reproducer, SafeArea.margins report 0 on all sides, regardless of the window-flags being set.

On the Motorola Razr 40 Ultra, Android 15, the window is extended to fill the display only on the main display. On the smaller flip-display, the window does not extend all the way to the bottom of the display, like other apps do. During testing, SafeArea.margins returns 0 even if you turn on/off the Qt.ExpandedClientAreaHint flag.

On the Samsung Galaxy Tab A9, Android 14, the window is extended to fill the display correctly when the Qt.ExpandedClientAreaHint flag is applied, and not extended when the flag is not applied. This is expected. In both of the configurations, SafeArea.margins returns 0.

The reproducer used (and attached below) is the following:

import QtQuick
import QtQuick.Controls
Window {
    width: 640
    height: 480
    visible: true
    title: qsTr("Hello World")    flags: Qt.ExpandedClientAreaHint | Qt.NoTitleBarBackgroundHint    

    Component.onCompleted: {
        console.log(SafeArea.margins.top)
        console.log(SafeArea.margins.left)
        console.log(SafeArea.margins.right)
        console.log(SafeArea.margins.bottom)
    }    

    Label {
        text: "Sample text"
        x: parent.SafeArea.margins.left
        y: parent.SafeArea.margins.top
    }
}