caterhamcomputing

CC Duplicate Menu adds a Duplicate Menu button to the WordPress menu editor, allowing you to create a full copy of an existing navigation menu.
The duplicated menu:
<ul>
<li>uses the original menu name with “ (copy)” appended</li>
<li>keeps the same links and labels</li>
<li>preserves menu hierarchy and order</li>
<li>creates new menu items so the copied menu can be edited independently</li>
</ul>
The plugin is built with security, privacy and WordPress coding standards in mind.

CC Duplicate Menu

Safely duplicate WordPress navigation menus from the menu editor.

Suman Ali

ACF Pro 5.9 comes with a duplicate row feature on its own. 
ACF Clone Repeater and Layout Fields in ACF Pro.
Supports all ACF Native fields.
<h4>Development</h4>
Please head over to the source code <a href="https://github.com/sumanengbd/acf-clone-repeater" rel="nofollow ugc">on Github</a>.

ACF Clone Repeater

Very Useful

Good plugin

ACF Pro 5.9 comes with a duplicate row feature on its own.

CC Duplicate Menu vs ACF Clone Repeater