After iPhones with 4-inch screens, now in the App Store we have images of "iPhone Mini" terminals, or at least that's what the developer of a applications. Some of you said in the comments that these images are put there only with the idea of generating advertising for the applications, and seeing the way the situation is evolving, I have to agree with you. I don't know who checks applications like this, I don't know why some developers are allowed to include such screenshots in applications, but I think that Apple should review its methods of checking applications.
Photos like this give the impression that such a device exists on the market, although in reality Apple will probably not launch an "iPhone Mini" in the near future.
Thanks to Silviu S.