Yes, all thanks go to the HBO Max team for a speedy fixed of their app. It is much appreciated.
Yes, looks like they finally fixed it. Took long enough. Just surprises me they continued to advertise Dolby Vision all this time.
Watched episode 3 of House of the Dragon, which claims to support Dolby Vision but I only get a HDR badge when it plays. Is it possible this is not fixed for all Roku devices? I am on a TCL R635, I confirmed both the Roku OS is up to date (11.0.0) as well as the HBO Max app (52.40).