I always share a single collection / Album with my community and also clients, a great option. But I'm trying to find the way to share multiples collections / Album, I also put all this collection in the same folder, but was not able to find the way. I ask for Adobe support, but their answer was ask to the Community!
Please State the Exact name of the Lr version you are asking about.
Lightroom CLASSIC (LrC)?
Or Lightroom Desktop (LrD, the desktop/notebook Computer Cloud Based version)?
To share multiple Collections just click the Sync icon to the left of the collection name.
Collection are Not Folders and they are not saved in any Type of Folder.
They can be in a Collection Set. A Collection set can contian Multiple Collections, one to many. Like the one Collection set I have that only has One actual collection in it or my Smart Collections set that has many Smart collections in it.
Also ther eare No Albums in LrC but there are on the Web interface and I think the LrD version and in the LrM and Web versions.