The vast somali semiarid desert is not a good place to build roads, cities, palaces etc. The ajuran sultans ruled the juba and shabelle valleys along with the southern coast so they were lucky enough. Adalites got their food from ethiopia’s highlands so they too were lucky. Warsenglis had some coastal towns in bari and did lots of trade.
Ajuran, Warsangeli, and Adal were separated by a desert with wandering nomads; had there been some good rivers and valleys in galmudug and ogaden, War between these sultunates could've very well happened. Ajuraan was one clan and they were oppressive, I think Adal, which was superior in numbers and military might, might’ve defeated them. With the newly gained land and rich cities, they could’ve won in Ethiopia and dominated the whole horn. If such a thing happened, Somalis, hararis, and Afars been under a single muslims Sultan united under Islam, then we wouldve been rivalling Egypt and Persia.