An interesting project, although very very broad. It is easy to mix armies from different periods in the stage that in Spain is called "La Reconquista", since it spans several centuries.
The armies of the "mythical past of Don Pelayo" have nothing to do with those of the time of Rodrigo Diaz de Vivar, "el Cid, or those of the Catholic Monarchs.
I hope you enjoy the creation process a lot and have fun with it. Much encouragement and I will follow it with interest.
By the way, the flag that you have assigned to the Muslims is the one used by the independent Riffs, who want to separate from Morocco. I'm telling you as a curiosity, since with my Rif War project, I came across that flag and I had to see if I could use it with my Rif people, hahaha.