Dolby Atmos or TrueHD pass through

Hi guys I am in the process of moving from plex because they never respond to issues. Anyhoo I have an onkyo tx sr444 amp connected to an atv4. When I stream media from my server to the atv4 I just shows pcm on the display panel. What am I doing wrong guys please help. And will this allow me to pay atmos movies?

With Infuse set to Auto, all audio will be sent as LPCM with no loss in quality.

A bit more info the available audio options can be found here.