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.
If you ask for it at a particular restaurant you will receive a tea pot full of beer, the restaurant is not authorized to sell alcohol. It’s an open secret.