No menu bar on certain Linux environments

import QtQuick 2.7
import QtQuick.Controls 2.3

import Qt.labs.platform 1.0 as Platform

ApplicationWindow {
    id: window
    visible: true
    width: 640
    height: 480

    Platform.MenuBar {
        Platform.Menu {
            title: "File"

            Platform.MenuItem {
                text: "New"
            }
            Platform.MenuItem {
                text: "Save"
            }
            Platform.MenuItem {
                text: "Open"
            }
        }
    }
}