We try to use NVDA with a simple example:

import QtQuick
import QtQuick.Controls
import QtQuick.Layouts

ApplicationWindow {
    id: root

    height: 480
    title: qsTr("Hello World")
    visible: true
    width: 640

    ColumnLayout {
        Text {
            text: "Testing 1"
        }
        Button {
            text: "Button 1"
        }
        Text {
            text: "Testing 2"
        }
        Button {
            text: "Button 2"
        }
        Text {
            text: "Testing 3"
        }
    }
}

It is not possible to select the Text elements with [NVDA Button]+[NumPad Buttons]. Buttons working fine.

Using "Accessible.focusable: true" does not help.
Using "activeFocusOnTab: true" helps to access the Text with Tab but [NVDA Button]+[NumPad Buttons] is still not working.

As example on Windows 10 in the Settings the selection of text with [NVDA Button]+[NumPad Buttons] is working fine.

Same Problem with JAWS and Narrator. Text ist not visible in the Windows Accessible API.