The Apple TV 4K will playback "Tomorrow War" in 4K HDR and atmos. If you are not able to do so with your own, then some settings are off and/or you have devices in the chain that are not capable of one or the other. For video , go into Apple TV 4K settings and match dynamic range for video and match frame rate as well for proper 24fps playback. For audio, go into audio settings and make sure "change format" is OFF and atmos below it is ON. If you still do not get 4K HDR and atmos playback, check settings in AVR and TV. And for future reference, UHD means 4K. Amazon Prime has the worst info labels for content I've seen. Oh, and you cannot Airplay 4K HDR or atmos, so only stream directly from the Apple TV 4K to get best quality.