Eagle vision Smartphone Kit is đź‘Ś for bird killing.

I am wondering why these scope camera setups do not have a build in lens to correct for the use of " normal " wide angle lenses at least as seen on action cameras often used here.
S0 you have to modify the camera itself with a larger lens so you do not have or at least less of it, round image.

As i see it, it would be fairly easy to insert a lens or two on the camera side of prism to correct.