pipdig

This plugin will disable WooCommerce product reviews across your entire shop. Compatible with all versions of WooCommerce, including 3.x (latest).
There are no settings, simply activate the plugin and you’re all set. Deactivate the plugin at any time to re-enable WooCommerce reviews.
Summary:
<ul>
<li>Removes the “Reviews” tab from all products in your WooCommerce shop.</li>
<li>Disables the “Enable reviews” option under “Advanced” product meta data.</li>
<li>Disables the “Reviews” meta box from product post types.</li>
<li>Removes the “WooCommerce Recent Reviews” dashboard widget and front end widget.</li>
<li>Works for all types of product – Simple, Variable and Virtual.</li>
<li>Super lightweight – less than 3KB plugin!</li>
<li>Changes can be reverted at any time. Simply deactivate this plugin to re-enable WooCommerce reviews.</li>
</ul>
This free plugin is brought to you by <a href="https://www.pipdig.co/" rel="nofollow ugc">pipdig</a>

Disable WooCommerce Reviews

Disable reviews for all WooCommerce products on your site.

Tim Eckel

With this plugin, newly written WooCommerce product reviews will be in a pending (hold) status until manually approved.
Product reviews in WooCommerce are immediately available for everyone to see (this can’t be changed without this plugin). WooCommerce ignores the WordPress “comment must be manually approved” discussion setting. With this plugin, new product reviews must be manually reviewed and approved before being visible on the front-end.

Manually Approved Reviews for WooCommerce

Force WooCommerce product reviews to be manually approved.

Disable WooCommerce Reviews vs Manually Approved Reviews for WooCommerce