Adam Erstelle

Pages By Role gives designers the ability to add pages to a widget while specifying what WordPress roles are required to view the link.
From a drop down you can select the page, user role and optional override text for each link you want to have displayed.
<h4>Future Functionality</h4>
<ul>
<li>Nicer looking interface</li>
<li>Editing existing links</li>
</ul>

HITS- Pages By Role

Pages By Role gives designers the ability to add pages to a widget while specifying what WordPress roles are required to view the link.

Alvaro Gómez

This plugin restricts access for Authors and Contributors so they can only see their own Media Library uploads.
This has two main uses: Make it easier for Authors to locate their own uploads when Media Libraries grow very big and prevent Authors from using or downloading media that belongs to other users.
Admins and Editors will still be able to see everyone’s uploads.

Restrict Media Library Access

Muy útil

This plugin works fine in WP 5.7.1 

It's just the example code from the official WP docs for the ajax_query_attachments_args filter, with a line added to check if the current user is an administrator. It's very simple.

There's no reason this plugin shouldn't work in an up-to-date WP installation

works in WP 5.7.1

Restricts access for Authors and Contributors so they can only see their own Media Library uploads.

HITS- Pages By Role vs Restrict Media Library Access