Yes, Somalia has a pavilion at the African Joint Pavilion. No Somalian mans it, but much of the data and props relate to Puntland State, the region more renowned to be the homeland of the now notorious Somalian pirates. The pavilion even has videos of Somalian dances and writeups about Somalian culture and traditions and of Chinese-Somali cultural exchanges since the era of Admiral Zhenghe in the 15th century. There is also a fibreglass model of a camel which many Chinese visitors love taking photos of.
The English captions do carry some hints of the typical Chinglish one finds across China, which throw doubts to the authenticity of the exhibits.