Just purchased a Roku Streaming Stick +. I am based in the UK. I cannot get Atmos to work in either Apple TV +, Netflix (have the 4K Ultra subscription) or Amazon Prime. I have good streaming speed 40Mbs/sec and have set audio to Auto in Roku. This gives me DTS sound but not Atmos. (the only other option is 'stereo'. Setup is Denon AV and projector plus full Atmos . Blue Ray works perfectly in Atmos.
Can anyone help in pointing me in the correct direction? Device ID is 23506A442022.