In the South East, they bring you sweetened (usually far too sweetened for my tastes) iced tea. This is amazingly universal.
I live in NC and have been probing the border for years.
For “nicer” restaurants, the universal sweet tea boundary seems to be precisely at the NC/VA border.
In the southern states of Australia you’re likely to be asked “English Breakfast, Peppermint or Green?” Maybe one or two other varieties depending on the establishment.