Not much is needed to determine the location preferences of religions, as most want to be a central point of life and therefore be present if not dominant in settlements everywhere. We can assume they prefer having a church in each. What we’ll need to work out is where they are accepted, adored, despised, banned, and just tolerated. This is not a single decision for our religion template, found in the appendix, but in each settlement and sovereign power file for our world. The reason is that this will change from location to location.
What we can decide here is whether they have special sites. These are places where a significant act occurred. Many will have the equivalent of a small shrine or at least statue to note the location, which might be remote and unguarded; they might have supernatural or technological elements to protect these sites from vandalism. Churches can acquire mythic status due to age, rarity, uniqueness, or treasured artifacts or remains there (such as bodies of saints). Such places are easy to invent because we can state, with little justification or explanation, that it’s the oldest place, or the only one with something, or lots of saints are buried there.