same annoyance here since Tahoe. Preview's Inspector got rewritten as disclosure groups per-window and Apple didn't persist the open state across launches — it's a real regression, worth a Feedback report. what i landed on: Metapho (App Store, also has a Mac version now) for a fast popup on single images, or exiftool wrapped in a Finder Quick Action for anything batch. Photos.app Inspector still shows EXIF flat with no clicks if the image is imported, if you don't mind routing through there.