So I've seen on other devices that movies such as "The Little Things" play back in 4K, Dolby Vision, HDR10 etc. When I go to the Roku device HBO Max app for the same movie, it says HD and no other formats. On that same Roku device I'm able to play 4K and HDR content on Netflix, Disney+, AppleTV+ and Amazon Prime. So I clearly know it's not my TV or the Roku device. Which by the way the Roku is set to 4K 60hz HDR and I even went into my TV settings and turned on the 4K HDR etc for this specific individual input as well.
Which I'm wondering why HBO/Warner would drop the ball on a highly requested feature that is available on pretty much every other device that supports 4K HDR including on a similar equivalent device, an Amazon Fire Stick.