alternatehistory.com

Here is a map of the Habshab state during the mid 16th century. As you can see we have Habashah proper directly ruled by the Emperor in Great Barara - including a small portion across the straits which is directly apart of Imperial rule. The Arab Vassalages are the oldest held by the Habashabs, but the southern and western vassalages are much more recent additions as a result of the Habashab-Portuguese War. Their holdings going north extends as far north as Aswan before it hits Ottoman Egypt. While the territory looks large on paper you should remember much of the territory consists of deserts and mountain ranges that have lead to the largest population centers being located on the coasts or in the northern provinces.

Due to the POD the Oromo Migration of the 16th century never manifested as a result much of the territory surrounding and to the west of Great Barara (Addis Ababa) remains Ahmara-Tigrayan speaking (the mix of Ahmara, Tigray, and splashed with Arabic as a result of the POD). Oromo is still spoken south of the Great Divide budding up against the Nilotic speaking peoples of western Kenya - with Somali of course dominating the east.