User blog comment:12shzarmai/Why isn't there MORE Servants or Heroic Spirits from other continents APART from Asia and Europe???/@comment-1458758-20180701023742

Well just for a quick run down.

North America - White Guys killed most of the indigenous people, so myths older than 250 years are unlikely to pop up.

South America - Same as above.

Australia - Same as above.

Africa - Same as above.

Antartica - Nobody lives there.

So of the 7 continents, we're kinda in a bad way for large selection pools basically cause Europeans suck and invaded everywhere they could for the past 1000 years.