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.
You’ll usually either get a pot of tea with a teabag or two in or a pot of hot water and some tea bags. Milk is usually served in a separate jug.