Can the projector display a volume bar when using external speakers?

The projector does not currently display the volume level for external audio devices like your Sonos system. This is because the projector cannot directly control or detect the volume levels of external devices. For the most accurate volume adjustments, we recommend using your Sonos system’s remote or app to control the volume. While we understand the convenience of having an on-screen display, implementing this would require deep customization and integration with external devices, which is not currently supported.