Would you find Heraldry throughout the world?
Heraldry of one kind or another can be found throughout, remarkably widely in the world. In the main, it's found in places where western European, medieval and early modern culture have been influential. So western Europe itself, former colonies, North America, Australia, New Zealand, and places like that. You don't see heraldry particularly in Asia, or particularly in South America, because it's not indigenous to those areas, and it wasn't taken there by colonial powers.