Santi

This lightweight plugin removes the “Posts” and “Comments” sections from the WordPress admin menu, disables commenting functionality across the site, and can disable the Gutenberg editor site-wide.
Ideal for sites that only use Pages or custom post types and want to simplify the admin interface.
Features: 
* Removes “Posts” and “Comments” from the admin menu 
* Disables comments and pingbacks across the entire site 
* Disables the Gutenberg block editor and restores the classic editor 
* Removes the comments admin bar link and related widgets 
* Cleans up the editing screens by removing comment options 
* Allows SVG and ICO uploads to the Media Library

Santi Tech Disable Posts & Comments

Removes "Posts" and "Comments" from the WordPress admin, disables comments site-wide, and can disable the Gutenberg editor.

Alan Cesarini

The Void is ideal for test sites. This plugin deletes all content in a WordPress single site. It deletes posts, pages, tags, categories, custom post types, taxonomy terms and menus. 
No filters or parameters. The Void cleans your site with just one click.

The Void

Removes all content in a WP site with just 1 click.

Santi Tech Disable Posts & Comments vs The Void