I want to synchronize displaying of smart album 'Hidden' between our image picker and Photos application.
Is there a way to retrieve value of switch "Hidden Album" from settings of Photos application.
Have you looked at the PHAssetCollectionSubtype of smartAlbumHidden? It should provide you with the assets that are currently hidden. https://developer.apple.com/documentation/photokit/phassetcollectionsubtype/smartalbumallhidden