The Rift(s)?

[Cleretic]

Yeah, there's multiple things called 'the rift' or 'the void' in FFXIV.

1. There's the space between the shards, which we've travelled a couple times and the Ascians used to hang out in; The Crysalis took place here, as best we can tell.
2. There's the space between Final Fantasy universes, which is plausibly but not confirmably where the Omega raids took place in, and was introduced in FFV as the Interdimensional Rift (hence the name in Omega). FFXIV Omega likely crossed through here regardless, and thanks to Gilgamesh it's completely undeniable that it's canon to FFXIV's world.
3. There's the Rift that Omega took place in, if that's separate to 2, which again is unclear. It might just be a sub-area within the greater area that's got the same name. Omega pretty clearly doesn't have as much control over this as it thinks it does.
4. There's actual physical space, which at the very least has the common decency to work how we in the real world understand it to, plus or minus 'ability to breathe in it'. Thankfully I rarely see this one cause confusion.
5. There's the Thirteenth/the Void, which is sometimes confused for 1 just because of vague wording, but 2 and 4 have also been called 'the void' in non-FFXIV contexts so some people with more experience in other FF games like V get the wrong idea.

The main way I survive this weird ambiguity is by the fact that, with the debatable exception of 2 and 3, they all mostly stay out of each other's way; you're usually only dealing with one of these at a time, and the one time two of these actually did appear in the same story (4 and 5 thanks to 6.4) they were both present enough to be blatantly different things.