These days most of the smartphones come with a multiple camera setup, in which, one can be a high megapixel camera, one can be ultra wide camera and one can be telephoto camera. In my Galaxy S20, there is one 64 MP Camera, one Telephoto and one ultra wide camera but as per my experience, I can use only the wide angle camera in the app. You can provide a switch to change the back camera as desired by the user for much better photography experience.