I saw a special program that introduced how to customize leather shoes according to feet, but it didn't specifically refer to Italy.

I think the most special and crucial step is how to get the 1: 1 model of the foot:

Put your feet in a container and inject special liquid. Dry it, then take it out and inject it into the paste, and then the "wax figure" of the foot becomes as detailed as the toenail.

Of course, the shoes after that are specially made according to this foot type.