Elvis Nyakangi

This plugin performs a very simple task. Once a Product or Post has been published and a front-end user with non-admin rights clicks save or update, the product or post will move to Pending Review until it is published by the Admin.
More about the Plugin:
<ul>
<li>This is a light weight plugin that is less than 2 kb. </li>
<li>You do not need any setting. Just install, activate and you are done.</li>
<li>It is a compatible with the latest version of WordPress.</li>
<li>It has been tested and known to work with a number of marketplace themes which allow users to submit and edit products and posts. </li>
<li>It works with Woocommerce WC Vendors plugin.</li>
</ul>

Edited To Pending Review

This plugin performs a simple task of moving edited products or posts to pending Review.

room34

Pending Status is a super-simple solution for WordPress sites that need very basic workflow functionality. It’s easy to set up and doesn’t overload your site with unnecessary features.
If you have Contributors who can create, but not publish, their own content on your site, Pending Status notifies you of any pending posts that are ready to review. By default, all users with the Administrator or Editor role will see a Pending Status box on the Dashboard, showing the counts of pending posts, with a convenient link to the list of pending posts for that post type.
Optionally, you can also identify one or more Administrators/Editors to receive email notifications whenever a post is saved with “pending” status. The subject and message of the email are fully editable, and a direct edit link for the post is included in the body of the email.
Pending Status works with all publicly queryable post types: Posts, Pages, and even Custom Post Types created by third party plugins (e.g. WooCommerce, The Events Calendar, etc.), or your own custom code.

Pending Status

Get notified when your site has posts pending review.

Edited To Pending Review vs Pending Status