The desktop version provides the most direct route to manage your professional privacy settings.

: You will now see a full list of everyone you have blocked, often showing how long ago they were added to the list. How to View Blocked Users on the Mobile App (iOS & Android)

Blocking someone automatically removes them from your connections list. If you unblock them later, you will not be automatically reconnected. You would have to send them a new connection request.

If you are having trouble navigating the menus, you can sometimes find the direct link by scrolling to the very bottom of the "Settings & Privacy" page and looking for "Blocking" under "Account Management," though the steps above are the standard path for the current LinkedIn interface.