Ferdy S

Simple plugin that adds pagination to the WordPress admin toolbar. Perfect for sites with many plugins that clutter the admin bar.
Features: 
* Paginates admin bar menu items (3 per page) 
* Keeps WordPress logo and site name visible 
* Responsive design for mobile devices 
* Customizable items per page (1-10) 
* Lightweight and fast

Admin Bar Pagination

Adds pagination to the WordPress admin toolbar to manage menu items on smaller screens. Shows 3 menu items per page with navigation controls.

Processby

Loading paged content with Ajax. Works with standard WordPress pagination, WooCommerce pagination, plugins. 
<a href="https://processby.com/blog/" rel="nofollow ugc">Plugin demo</a>
<h4>Features</h4>
<ul>
<li>Ajax pagination;</li>
<li>“Load more” button;</li>
<li>“Load more” button and pagination;</li>
<li>Infinite Scroll;</li>
<li>Customisable styles.</li>
</ul>

WP Ajax Load More Pagination and Infinite Scroll

It is a great plugin. So much easy to use. It is also light. It saved me from hours of works. 
Thanks to the author. 
I hope author will keep it up to date and won't add unnecessary codes in the future.

Admin Bar Pagination vs WP Ajax Load More Pagination and Infinite Scroll