Yeah, Fate of Iberia did a pretty good job giving content for the different cultures/faiths in Iberia. There are a lot of decisions to create unique realms; from Aragon, to Toledo, to Portugal. You can Avenge the Battle of Tours as the Muslims or do the Reconquista as Christians. You can bring back Basque paganism and (with the recent decision) Old Vasconia. Even the Canary Isles got some flavor with Achamanism and the Kingdom of the Canarias decision.I think we should take it as a given now that flavor in CK3 is very narrowly scoped
-Scandinavian DLC is pagan-only
-Persian DLC is 867-only and with (next to) no Turkic content
-Byzantine DLC has nothing for Orthodoxy, South Slavs, or Turks
-Iberian DLC... well, that did cover Iberia pretty fully so there's nothing to say on that one
Slavic DLC I would bet good money will be Russia only. India DLC I actually predict will only focus on earlier start dates and Dharmic realms, and once again turn a blind eye to Turkic presence in the region.
I’ve played in Iberia a lot more than I’ve played in Persia.