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.
The blueberry leaf tea grown in Georgia is one of the tastiest teas I’ve tried. Whenever I’ve been to the Adjara region it’s always on the boil, ready to drink.