These specifically mentioned foods with maybe the exception of the fish tacos are pretty much nationally available and standard fare in my opinion. Some have regionalized variations but they can all be found in just about any city in the United States in fair abundance.
My specialty pursuit, the deep-fried breaded pork tenderloin sandwich does remain regional to the three states of Iowa, Illinois and Indiana and very quickly bleeds out midway or nearly immediately as a common offering in the states that border those three. Then they can only be found sporadically as a specialty item beyond those states usually with attribution to Iowa or Indiana to appeal to snowbirds or Midwest transplants to places like Arizona, Florida and Southern California. Interestingly, as the Culver’s chain expands that sandwich could go national and be an alternative to the fried breaded chicken sandwich.