Android: MediaPlayer: AudioOutput via HDMI not possible

qputenv("QT_MEDIA_BACKEND", "android");

import QtQuick
import QtQuick.Controls
import QtMultimedia

ApplicationWindow {
    visible: true

    MediaDevices {
        id: devices
    }

    MediaPlayer {
        id: mediaplayer
        source: "https://hls-master.video.pareygo.de/1adbe4a13e6f65fc282ce1ceef22117c.m3u8"
        audioOutput: AudioOutput {
            Component.onCompleted: {
                for(var audioDevice in devices.audioOutputs)
                {
                    if(devices.audioOutputs[audioDevice].description.startsWith("HDMI"))
                    {
                        device = devices.audioOutputs[audioDevice]
                    }
                }
            }}
        videoOutput: videoOutput
    }

    VideoOutput {
        id: videoOutput
        anchors.fill: parent
    }

    Component.onCompleted: mediaplayer.play()
}