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.
Same, although it’ll probably be served in a little teacup (about 2 cup’s worth) with a generic teabag in it. There may be a small pot of hot water on the side.
(Europe as well)