Absolutely there are swamps. Swamps are just a transitional area between water (rivers, lakes, etc.) and woodlands. Since there are numerous lakes and rivers in the expanse, and a whole lot of forest/jungle there's going to be plenty of swamps. It's just that the river/lake and the forest is going to be of more interest to most folks since swamps are comparatively inconvenient (it's comparatively hard to build there, it's comparatively hard to extract resources, and it's comparatively hard to transport things through swamps).
It's a good place to escape attention, if you can deal with the bugs, wildlife, and everything being wet all the time though.