From my experience it depends which arab country we consider. Some of them think we are arabs some others don't.Maybe its because we are in the Arab league they just automatically think we are Arab.
Most maghrebis(moroccan, tunisians and Algerians) don't really know much about us and assume we are just african muslims
-many egyptians are genuinely convinced we are arab to the point they will start speaking arabic when they meet a somali. They even get surprised if you say you dont know arabic.They think we are some kind of black arabs like the sudanese.
-most Sudanese, Saudis and Yemenis know who we are and don't consider us arab but still feel we are connected to their culture.
The rest of the arab world(Syria,Iraq, palestine, Lebanon etc ) either don't know much about us or think we are some kind of afro-arabs.
But most in my experience most of them don't really consider us arabs except for egyptians