Various

  How Can I Duplicate Articles?

The following plugin will allow you to duplicate Knowledge Base articles:
https://wordpress.org/plugins/duplicate-page/

  How Do I Change Order of Articles and Categories?

You can set the order of articles and categories displayed on the Main Page (and Article Pages if you have the Elegant Layouts add-on). The order can be set to alphabetical, chronological or custom.

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Does Knowledge Base plugin and its add-ons work in a multi site structure?

Yes Knowledge Base, Elegant Layouts, Multiple KB, Widgets, Advanced Search and Linked Editor all work in multi-site WordPress instance.

However Access Manager is not supported to run in a multi site structure.

Does KB supports Gutenberg?

Yes Knowledge Base plugin supports Gutenberg.

How Can I restrict access to Knowledge Base?

Please see our Access Manager plugin: Access Manager