Folded over so the cheese is on the outside then held with ham fists.

Better yet, Chicago style, but folded over so the sauce is on the outside and then eaten no hands like a pie contest

They do not.

Whataburger.

Whataburger is only in 16 states versus Wendy’s 50 so not really fair question.

Edit citation for my original 51. My brain turned off while I typed it out sooo yeah 50 states in the US

https://brilliantmaps.com/us-locations/wendys-locations-us/