We can list the libraries shared to one user (in “Users and Shares”)
But we can’t list the users who can access to one library ?
Managing one library, using the option 3 dots > Share, the window directly ask us to add a new user.
It would be good instead, to display the list of current users having access, followed by a text field to add a new user if needed.
For now, to know who can access to one library, we have to open one by one each user to know which library they can access.