Sure enough, when I checked my iPhone 15 Pro this morning, the toggle was switched to on. You can find it for yourself by going to Settings > Photos (or System Settings > Photos on a Mac). Enhanced Visual Search lets you look up landmarks you’ve taken pictures of or search for those images using the names of those landmarks.
To see what it enables in the Photos app, swipe up on a picture you’ve taken of a building and select “Look up Landmark,” and a card will appear that ideally…