So in my world, ghosts are definitely a thing that exist, so therefore something at least like a soul must exist. It's fairly common knowledge, albeit most people don't know a lot about them, only that they generally aren't nice and if they linger too long, they get very powerful.
There are also spirits (which might be renamed later) that are basically consciousnesses who can split from their body (or around their body if the body is small and relatively portable). These are well known. Their method of coming about used to be well known but is not commonly known anymore (still known to some though). The method is that sometimes when attempting to create something magic through mixing preexisting magics with other objects, sometimes something would turn out to be conscious. This was usually the case when an emotional component is involved, such as sacrificing an object with strong emotions tied to it and/or an intellectual component, such as a book.
People are aware that there are other worlds (or something along those lines) as well since it is literally possible to walk off the edge of the world and scavenge for objects (there's an entire job focused around it). However, they can only guess about the nature of these other worlds, and otherworldly magic doesn't really translate, and technology levels are too low for them to know what to do with machines, plus anything solar powered will be wonky at best if it's not taken to a farmer, and if it isn't waterproof, forget it. Also, it is entirely possible for people to fall from one world to another, though this world loses far more people that way than it gains.
No one knows for sure if there is an afterlife. Populations are generally small and scattered, but originated from a far more united population.
Sorry this is complicated, but does anyone have any idea what kinds of effects these factors would have on religious beliefs?