What are you talking about? You extract 3 exposure values from the raw camera buffer and merge and tone map them manually into a single HDR image. The final exported image format may not have the full supported color space, but that’s on you. Apple uses the P3 space by default.
This has been supported by both Apple and third party apps for over a decade. I’ve implemented it myself.
This has been supported by both Apple and third party apps for over a decade. I’ve implemented it myself.