Peteran/Jacoban religions.

"NationalPokedex;c-17455584" wrote:
Maybe if they do a new TSM.

I suppose you could use the Holidays from Seasons to give some sense of religion (recreating real holidays, or making up your own, which is what I've done in my game). (Reinforcing the idea that sometimes this game gives you tools and you have to figure out how to make those tools work for you).
There is one holiday ritual that is called Attend Festive Ceremony (or something like that) and the Sim just disappears for a few hours while they attend the service elsewhere.
The downside to that ritual is you can't actually designate a lot to be the lot where the Sim attends the ceremony, so if you build a church or temple, it's not like they're specifically going there but you can pretend they are, I suppose.

Also you can always build a church or temple, and then maybe even make clubs that hangout there and set activities so it looks lively. There aren't a ton of activities for clubs, and even less club activities for doing things that might be considered in the realm of traditional religious/ritualistic activity.

I mean, the game already has Christmas trees, Menorah, and Kinara, so there are bits of religion in there. You can build lots and place religious objects in them.

In my Victorian save last year I made a church and sent my active households there every Sunday morning, where they would chat a bit with their fellow parishioners then go off lot to attend the ceremony, then come back and chat again. I still have that save but haven't played it since the summer but I will eventually do something similar, but perhaps less regimented, in my current save.