I added the Terralith datapack to a new world on my server, but am I not getting it? Everybody gets the same world right? Yo have to download other seeds? I don

I added the Terralith datapack to a new world on my server, but am I not getting it? Everybody gets the same world right? Yo have to download other seeds? I don't see massive changes, any coordinates that are particularly interesting in the default world? Edit, I think I found something nice (a cave) at -281, -15, 436, that's not something 1.18 generates by default I guess?