Hello SinRyder! I'm afraid the game page is outdated in that section, as the base game doesn't include any support for The Exiles and the expansion must be bought separately. That said, you can find a free demo for the expansion over at https://pocketcompass.itch.io/exiles
While the Exiles' playkit is just a rough preview of the final game, you can feasibly get a game of it started in combination with base CM in the meantime 🙂
Hope that helps!