Well, to be honest, if the Christianization of North Africa is more or less possible, then with Egypt it is already more difficult - I think that the Lebanon level is the maximum here.
As for emigration, something similar has already happened. In 1590, the Moroccan commander of Iberian origin, Jurad Pasha, led an army of more than 3,000 Morisco Muslims, which took Timbuktu. Their descendants are known as the Arma people. In one timeline, as a result of the fact that the Portuguese conquered Morroco, and Spain ruined Algeria and Tunisia, the migration was more massive. As a result, the territory of the Songhai Empire came under the rule of the Morisco caliphs, where segregation began between the Arab-Berber nobility and the local commoners.