> If it were possible to switch out the lens on the iPhone...

It is possible to "switch out the lens" on an iphone, because iPhones ship with multiple camera lenses. (Well, multiple entire cameras). The iphone 16 they're using here has 3 cameras. And yet, I'm pretty sure the photo of the boys was taken with the ultrawide for some reason. A lot of the distortion problems would go away if they took a few steps back and used one of the longer lenses - just like they did with the DSLR.