hello

you should add the hilalians arabs (banu hilal and banu sulaym) (emirate ???) they are present in the crusader kings 2 1066 start date map but not in the "eu 4" 1066 start date map and maybey the banu maqil and the banu djochem who where two other important tribe that come with the hilalians (i d'ont know if they used tho rule any land). they where sand by the fatimid to punish the zirids for abandoning shia islam they later converted tho sunni islam and for some of them mixed with natives berbers and finally get defeated by the almoravids berbers

https://en.wikipedia.org/wiki/Banu_Hilal
https://en.wikipedia.org/wiki/Banu_Sulaym
https://en.wikipedia.org/wiki/Maqil
https://fr.wikipedia.org/wiki/Jochem (sorry link in french because don't existe in english)

and also since they where responsable for the ethnic and cultural arabisation of the maghreb they should by an event (if they win and conquere all the maghreb or historically lose to the almoravids berbers and get deport all over the region) thate spawn morrocan,algerian,tunisian and maybey lybian culture or a new "maghrebi" culture

and sorry for my english