The original title referred to Apple’s endorsement of an upcoming ISO standard that defines how to represent HDR images within existing still image file formats such as JPEG-XL and HEIF. It turns out that there isn’t any such finalized standard — unlike, for example, BT.2020 in the moving image file formats space.

So, presumably, the existence of a standard under development — and the endorsement of it by a major manufacturer of cameras and displays — was considered newsworthy by the OP.

HDR and higher bit colors are becoming more popular but are still very much a mess from the consumer and software developer standpoint.