We already have one thread regarding this but I assume we have the Karen, Bavandid & Justanids. They likely have slightly altered starting strength and holdings. Bavandids likely start as dukes in this start for example.
Vandad Hormoz (Karen) led rebellion against Abbasids around this time, destroying several muslim armies. In game terms whole thing eventually ended in white peace
Depending on paradox, there might be some Zoros in de-jure Khiva in form of Sogdians. At least there should be. Whether independent or vassals to turks, remains to be seen. Nonetheless, I am pretty sure have some Zoro vassal or two among turks. If we have Sogdians, they are likely a vassal duchy.
Likewise, Alania should have Zoroastrians and possibly around Afghanistan. At least number of Zoro provinces in map is likely much greater.