The search for the iPhone 7 you want is being more complicated than that of some Pokémon, especially for those who want the black, ate and shiny black models. To make things easier, not getting the iPhone you want, which depends on Apple, but at least not wasting time taking useless walks or making unnecessary calls, At iStockNow they offer us a map that is updated in real time and in which we can see the availability of iPhone 7 and iPhone 7 Plus in each color and in all physical Apple stores around the world. As easy as choosing model and color and looking at which store the icon appears in green. All the information and links below.
The web uses Google Maps to offer us in real time the availability of iPhone 7 and 7 Plus, offering data from Apple's physical stores in the United States, Australia, Belgium, Canada, China, France, Germany, Hong Kong, Italy, Japan, Holland, Spain, Sweden, Switzerland and the United Kingdom. The web allows you to filter the search not only by iPhone model (7 or 7 Plus) but also by color, capacity and operator, although in Spain the operators are not valid. If you are lucky and in your search a store has availability, the icon that the brand will have green. By clicking on it, you will see the information of the store, when the information was last updated, and even the models it has available. It seems incredible that the web can obtain so much detail but uses direct information from Apple, so it seems that it is totally reliable.
Playing a little with the map we can see that the device that is most scarce is the iPhone 7 Plus in glossy black, which is not available in any store in the world, although in general all iPhone 7 Plus are very scarce, while the iPhone 7 are easier to find, especially in "conventional" colors, such as gold, silver or pink. You have the map available at this link.