The latest Beta of iOS 15.4 leaves traces of a novelty of iOS 15 that had not yet been seen outside the United States. The Visual Finder, which identifies objects in your photos, is already available for some in Spain and that's how it works.
Apple presented iOS 15 last June with a good number of new features, although some of them were not available at launch. This is the case of the so-called "Visual Search" or "Visual Lookup" that was only launched in English and within the United States. ANDThis feature is that the iPhone reviews the photos in your gallery looking for interesting places, such as monuments and other places of interest, plants, animals and works of art.. Once these photographs are identified, they are tagged and it shows you the information on their content.
You can check in the header photo how it identifies a monument as “The Alhambra”, or in this image how it labels the plant as “Cyclamen” and the dog as “Labrador”. These are photographs taken at different times, and although the one from the Alhambra is more recent and taken with the iPhone 13 Pro Max and iOS 15 already installed, the one from the ground floor was taken with an iPhone 11 Pro Max, and the one from the dog didn't even get an iPhone. iPhone reviews all the photos in your gallery, regardless of date or device with which they were made.
To see this information we must click on the “i” that appears at the bottom of the screen when viewing a photograph, or slide up. It will then show us information such as the device with which it was carried out, the objective used, location... and in the event that there is a satisfactory identification, A “Consult” button will appear just below the photo that you must press to see what it has identified. When showing you the information, it will offer you links to enlarge it, and similar images from the internet.