I’ve already built accurate churches and cathedrals in The Sims 4 without needing real‑world religions added to the game. I even made a Catholic church with confession booths.
And honestly, you probably wouldn’t like the fact that the basement has a nightclub inspired by Dante’s Divine Comedy — it’s called Dante’s, with a Paradiso level and an Inferno level, complete with DJs and dance floors.
The game already gives enough tools to build religious spaces if players want them. We don’t need actual religions added, especially not just four Christian denominations.