There’s a postulate that a lot of the areas around the world with “oldest alive humans” are actually just places with bad/lost records. Especially if it lets you claim retirement benefits early.

https://jheor.org/post/2682-ig-nobel-prize-winning-research-longevity-claims-may-reflect-lousy-birth-and-death-recordkeeping-more-than-accurate-human-lifespans

I say this as response to show that there are a lot of places with bad records.