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In marketing-speak, the various 'HDR' standards refers to a bunch of things, not just to dynamic range : https://www.cnet.com/news/dolby-vision-hdr10-advanc

• brudgers 6y ago
  Early drafts of my comment kept going off into the weeds of "high dynamic range" versus how people tend to use "HDR" to describe pictures made by reducing more bits into fewer bits while maintaining the perception of more bits which in photography is basically every black and white print made from a well exposed black and white negative of a scene with at least moderate contrast...obviously I am letting this comment go into the weeds. More recently, "HDR" can also refer to mapping fewer bits in the source into more bits on the output in the case of displays. Anyway, disentangling dynamic range from gamut just a bit seemed like it might add some light.