Premiere Pro guy here, but still a long-time user of Lr (classic and cloud).
I've got some DNG images taken with the Lr Mobile camera that I'm trying to get into Apple Photos as RAW files. The images were taken with various iPhone models, starting with the iPhone X. When snapped, I usually preferred the hdr-dng version to the regular dng version, so I deleted most of the regular dng's.
When I export now from Lr (either macOS 12.5 or iOS 15.5), the few regular DNG files I have export and add to Apple Photos perfectly. The hdr-dng files end up a blown-out white & magenta mess.
For reference, here are 2 screenshots of what the regular dng's look like in Camera Raw 14.4 and Apple Photos.
Now here is what happens with the hdr-dng's:
Apple Photos (and in Preview on Mac, and in RAW Power, and in Pixelmator Pro, and so on):
If I export as a DNG from Camera Raw, I get the same result as exporting from Lr.
I'd be grateful for any help or insight, even if that help starts with, "Hey Stupid!" 😀
This issue is being tracked by the Lightroom team as an Apple Feedback issue. I have not ETA for a fix date. In the LR app export menu, you can use TIFF as a high fidelity rendition of your image that won't have the same display issue.
Also, I'll convert this to a bug, so I can tag this internally for tracking.