atillaordog

The search fields simply filter the lists in their current box.
Use the settings page to manage the location of search fields.
Simple as the sun, using easy JS.
Especially useful when there are a lot of categories, like in case of a shop.
It needs jQuery to run ! 
Trims beginning and ending spaces ! 
Works with the classic editor of WordPress 5, the new editor has this functionality included.

WP Admin Category Search

The plugin works flawlessly and is very simple.

Works fine and solved my problem

This plugin adds search functionality to category-like taxonomies and dropdowns like author on add / edit post / page admin pages.

jeffrey-wp

Adds the ability to use categories in the WordPress Media Library. When activated a dropdown of categories will show up in the media library. 
You can change / add / remove the category of multiple items at once with bulk actions. 
There is even an option to filter on categories when using the gallery shortcode.
<h4>Features WordPress Media Library Categories</h4>
<ul>
<li>add / edit / remove categories from media items</li>
<li>change the category of multiple items at once with bulk actions</li>
<li>category options & management in the Media Library</li>
<li>filter on categories in the media library</li>
<li>filter on categories in the gallery shortcode</li>
<li>taxonomy filter</li>
<li>support for WordPress 4.0 – 6.9</li>
</ul>
<blockquote>
Try Premium version – 100% money back guarantee 
 WordPress Media Library Categories Premium adds the option to filter on categories when inserting media into a post or page. 
 <a href="https://1.envato.market/c/1206953/275988/4415?subId1=wpmlcp&subId2=readme&u=https%3A%2F%2Fcodecanyon.net%2Fitem%2Fmedia-library-categories-premium%2F6691290" rel="nofollow ugc">Try now – 100% money back guarantee</a>
</blockquote>

Media Library Categories

When edition a page in classic or new block system you never see a preview , it's always no items found.


On the visitor site their is no issue (for now)

BUG? in editor you always see no items found

Adds the ability to use categories in the media library.

WP Admin Category Search vs Media Library Categories