I'm streaming Peacock through the native Android app on the 900E.I don't know what you're using for a streaming device, but like CBS All Access, it seems the Peacock app is only capable of delivering two channel audio on devices that use Android TV (or a subset thereof like the Amazon Fire devices do). Three out of four of my streaming devices only deliver stereo audio, while Disney+ and Netflix do just fine with DD, DD+, and Atmos.
I tried very hard over weeks to get CBSAA 'support' to acknowledge the problem and suggest they were working on a fix, and it was a painfully frustrating experience. So yesterday I cancelled the service. I'm not paying $10/month for a service where the provider is too stupid to understand current delivery standards, and thinks that HD with two channel audio is worth $10/month in 2020. Just pathetic.
I won't even mention the stupidity of the CBS app never remembering what I've watched, and no matter what show I select, always offering to play Season 1 Episode 1, forcing me to back track and manipulate around to figure out what episode is next for me. They don't seem to grasp the concept at all. I suppose that's what comes from making money hand over fist for many decades while running a four company monopoly (CBS, NBC, ABC, Fox).
So that's two major broadcast networks that have ventured into streaming without properly addressing audio.
Is the problem due to improper programming by the networks when creating the app or lack of standards from Android?