Some time ago, Microsoft replaced the Skype UWP application with a newer electron version in the Store. Because of this update, Skype has lost some of its features, which Microsoft is now restoring to the latest version of the app.
The transition from UWP to an Electron app has not been smooth, but it allows developers to easily adapt Skype to many more platforms, such as Chrome OS.
A new version of the Skype app from its Store companys now allows you to reply to messages conversations directly from notifications that appear on surfaceof their work Windows 10.
You can try the new application from here