I doubt Aragon would go for more than coastal control : they had neither ressources to undergo an hinterland conquest that hugely backfired with Portuguese in Morroco, neither interest doing so (Aragonese/Catalan thalassocracy being more tied to control over Western Mediterranean.
While the absence of an Ottoman hegemon on Mediterranean could allow an Aragon separated from Castille, ITTL, to maintain a presence on main IOTL Algerian and Tunisian harbours; this same absence would most probably take away one of the main reasons why Spain went for Maghrebi harbours in first place.
Eventually, I could see some hold-out points, as IOTL that Aragon would feel itself forced to defend against hinterland tentatives for not much good reason safe prestige (unless we're arguing of a much stronger Morroco ITTL, but it could make conquest of harbours more had than IOTL).
It would probably require some different PoDs, early ones with that, and some disregard for sound geostrategy.