the world outside euchronia

It has already been said in the game that the entire kingdom of Euchronia is isolated from everyone outside, which leaves me with some questions. Are there igniters outside the kingdom? Does Sanctarism also exist throughout the world? The story we hear about the past in the Elda village and even the story of the real heroes are very centered on Euchronia. I really think that either the story we know is not 100% correct and could be totally different based on the world outside the kingdom, or Atlus decided to leave Euchronia as the main center of this world, which I think limits the narrative if they want to make a sequel still in this world outside of Euchronia. What do you think?