Ryujin
Legend
I have legitimately never met someone who has a "Mid-Atlantic Accent" and have only heard it in old radio serials, and movies from the 1930s.Most of the tinevyes. Sometimes I get it wrong though so a strong Canadian accent I can.
Some have a generic mid Atlantic type accent and unless they say about one can mistake them for Muricans. Much to their chagrin.
Sometimes I can broadly pick an American accent eg wid west, west coast, Southern, east coast very rarely state.
I can't get Canadian or English regional ones not sure they exist in Australia. With English I can sometimes tell they're from somewhere but I don't know them well enough to guess where that some where is.