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.
Could be either, since I don’t drink tea, but I’ve always known a teapot as the unpowered thing you put on a stove, oftentimes something fancy. Since I’ve seen things you plug in to make water hot, they’re always called a kettle (double checks Amazon). Some fancy China or whatever thing you put on a table is what grandma used for guests and we’d never have such a thing
Stovetop kettles are the og and existed for centuries before electric kettles. They’re all just called kettles though and the heat source modifer is rarely mentioned.