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.
Here they tend to either ask you if you want green or black tea or bring you a box of lipton with various flavors and let you chose from that.
And 9/10 chance it’ll taste moldy AF.
Tea isn’t very common here.