Qt 6.3 FileDialog does not show "Save" button on Raspberry Pi OS

CryingHippo

Hello

My software is crosscompiled.
Target os Raspbian Linux 11 (bullseye) running on RPi 400

QML Code :

import QtQuick
import QtQuick.Window 
import QtQuick.Dialogs
import QtQuick.Controls

Window {
    visible: true
    width: 640
    height: 480

    FileDialog{
        id:fdSave
        fileMode:FileDialog.SaveFile
    }

    Button{
      text:"click me"
      onClicked:fdSave.open();  
    }

}

Expect to see "Save Dialog", but "Open Dialog" is shown.

screenshot (https://imgur.com/a/xRKjZzs) :

screenshot