Photos permission prompt mentions captions but it’s not possible to access captions

The updated Photos access dialog in iOS 17 states:

Photos may contain metadata, such as location, depth information, or captions.

How do I access the caption a user added to a photo in my app? This wasn’t possible in iOS 16, is there new API in 17? I previously requested this ability via metadata in FB10205012 and via PHAsset in FB8244665. If it remains inaccessible I’ve submitted FB12437093 to request captions be removed from this wording.