iCloud Shared Folder not showing up in Finder

On iCloud, I've shared a folder with my wife who is part of my family iCloud plan (not sure that makes a difference or not). I'm assuming she should be able to see the folder in the iCloud directory when she opens Finder on her Mac? What we have noticed is that she can see the shared folder and its contents when she is using her iPad file app, but when she looks in her Finder app on her Mac, the shared folder does not show up in her iCould directory, which means she can't access any of the files in there. Any suggestions on fixing this?