The "Jungle of Jewels" is supposedly a third part of the expansion pass, which is supposedly Zarude's home. Has Nintendo actually confirmed this and is it even real?
The Jungle of Jewels is not real, this is a rumor from a Youtube video, as it is not confirmed, but is fake. Right now, Game Freak and Nintendo have not told us that this is coming or real. In the video, he said that this is only a rumor, it may not be real. If this was real, we would've gotten some kind of notification, right? This is fake and only rumored by fans.
Hope I helped!
It's made up by fans, it's not part of the Expansion Pass (that we know of).