I knew we only do it with a few countries but Canada is most common. We certainly don’t do it with Cuba.
Lots of Canadian and American citizens have been born in the other country simply due to the fact that they used to go to the nearest hospital.
Then why did you categorically assert, "Nope. We only do the dual citizenship thing with Canada"?
Regards,
My son was born at an Air Force hospital in Okinawa. He had dual Japanese and US citizenship until he turned 18 and he chose US citizenship.