WebHostingHero

<p>This plugin displays a drop down menu in the admin dashboard that allows you to filter the page list by their parent page. No configuration is necessary.</p>


Parent Page Filter

It's a simple plugin and does the job, but only if WP_DEBUG is disabled.
The two main issues I have with this plugin are:

It assumes that $_GET['post_type'] exists and/or is set, when it mightn't, which throws PHP warnings and sometimes actually halts page load, here and here.

Not ready for translation

(I am happy to patch by the way, a GH repo would be nice)



Works ok-ish, needs a few tweaks

This plugin allows you to filter pages by parent in the admin dashboard.

enomoto celtislab

<p>Document hierarchy pages like a book and provide easy navigation between pages.</p>
<p><a href="https://celtislab.net/en/wp-plugin-hpgnav/" rel="nofollow ugc">Documentation</a></p>
<h3>Used library</h3>
<p>jquery.mjs.nestedSortable.js  https://github.com/ilikenwf/nestedSortable　 MIT license</p>


Hierarchy Pages Nav

Document hierarchy pages like a book and provide easy navigation between pages.

Parent Page Filter vs Hierarchy Pages Nav