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.
In a better place, I usually get a menu with a number of different teas (Ceylon, Assam, Darjeeling, Green, several fruit and herbal teas), which will be served hot and unsweetened, of course.
In a lesser place, I might get a selection of only two or three teas, usually a black breakfast blend, a green tea or Earl Gray, and maybe a mint tea as a herbal variant.
I live in Europe.