FYI, for Fire TV 4K device users.
CBS ALL ACCESS standalone app on Fire TV 4K device is now supporting Dolby Vision AND 5.1 Audio on ST: Discovery and ST: Picard. I was previously seeing DV support for these two shows and only Stereo audio. I guess a recent update has turned on 5.1 Audio as I am seeing it indicated on most current content.
UPDATE: I didn't realize that Dolby Vision and 5.1 Audio is only available on the commercial-free plan. A user in the Fire TV Sick 4K thread was troubleshooting no support for DV or 5.1 Audio on his system and didn't get either until he upgraded from the ad-supported pricing tier.
TCL Roku-TV 55P605 (4K/HDR/DV) | VIZIO SB36512‑F6 ATMOS Soundbar | Fire TV Stick 4K
TCL Roku-TV 43S425 (4K HDR) | Fire TV Stick 4K
TCL Roku-TV 32S301 (720p) | Fire TV Stick 4K
Last edited by blade005; 06-07-2020 at 07:08 PM.