No DTS pass through with Onn 4K pro

I’m testing out an Onn 4K pro (current version) to see if I like it more than the Firestick 4K max.

Same settings on both and using the same tv/receiver.

I don’t get any audio when playing a DTS movie with the Onn box but get full DTS with the fire stick.

I know the Onn box doesn’t support DTS HD but I figured it would be able to pass regular DTS.

Has anyone had success with this?