I don’t know how you speak.
Almost everyone, from Pennsylvania West, and North of Missouri/Kansas plus the Southwest (except TX and SoCal) have little or no accent (Chicago accent) You can’t really tell where they’re from.
Mid-Atlantic? What’s that? Washington DC?
Every American has an accent. Perhaps you don’t hear Kansas/Chicago and other Midwestern accents but I do. How else do actors learn to portray characters from these various locales? I have a New York accent although slightly modified unless I want to make a New York point.