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 ask for iced or hot, and you usually get some nasty ass Lipton tea if you go for hot, though this may vary by restaurant. I love tea, but I’ve spoiled myself with fancier ones to the point where I can’t stand most of those big American brands. Some iced teas I can at least tolerate though.