It worked! I also had a question because I'm on my server which has multiworld and when I first opened it on the server I accidentally disabled multiworld and now whenever I try to download the same coords on a different world the chunks overlap and overwrite eachother. Now I tried to look into settings if there was a way to enable it again but there doesn't seem to be one. Any idea if there is a way to re-enable it? Because it's kind of annoying that I have to separately download the 2 worlds.
That can be a bit annoying to deal with. Unfortunately there isn't a setting to enable multiworld directly, but you can get the prompt to trigger again by deleting the world (or renaming its folder in the saves folder; this can be found by clicking the world, selecting edit, and selecting "open save folder" or something like that; or alternatively it's in the instances subfolder of your MultiMC install.) Either way, new chunks will be saved into separate worlds and it won't re-use chunks you've saved when you had multiworld disabled.