by Hamza Mairaj on WordPress.org
Easily set a custom 404 error page using any WordPress page. Design your 404 page as a regular page and use it as the 404 template for your site.

screenshot.png
The 404 Designer plugin allows you to design a custom 404 error page using any WordPress page builder (such as Elementor, Beaver Builder, Divi, or Gutenberg) and set that page as your site’s 404 template.
Instead of using a generic and bland 404 error page, you can now use your creativity to design an engaging and user-friendly page to guide visitors when they land on non-existent or broken links. Simply design a page like you would for any other page on your site, and select it from the plugin’s settings page to set it as your custom 404 page.