The new update for Sway for Windows 10 is now available at Windows Store. Microsoft Sway update comes with the new features, bug fixes, and improvements. According to the changelog, Sway now allows users to make private Sways which means other users can’t view the Sway unless they have permission to do so:
Make your Sways private: Your Office 365 subscription now makes it possible to use passwords for keeping your own Sways private and for viewing protected Sways that others have shared with you.
Bug fixes: Improved Sway and have fixed several miscellaneous issues in this release