There aren’t many but there’s at least one example of each. It requires a ton of knowledge and research to come up with a good civ suggestion. Generally, European history is much more widely known and accessible so it’s simply easier to come up with a suggestion for that. If the average person were as knowledgeable about Siam or Kazakhstan as they were about Poland, there would be just as many suggestions for them.
Even one with both Poles and Tatars (with Tatars being heavily based on Kazakhstan).