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.
Netherlands: you get asked what kind, or hot water with a box teabags to pick from.
Iced tea is a seperate thing entirely.
Ordering tea and getting hot water and teabags in return is my restaurant pet peeve. It’s gotten to the point where I don’t even bother unless I know they’ll actually bring me a pot of already-brewed tea.
Why?
Because I don’t want to have to prepare my own drinks; that’s why I came to a restaurant instead of eating at home.
Do you also need someone to pour it in your mouth?
I don’t think it’s bizarre to expect that my food be in ready-to-eat condition when it’s served, why should drinks be any different?
Calling dropping a tea bag in a cup of hot water “preparing a drink” is a bit of a stretch