Use page's ability to have a child page in post now.  You can now make any post child post of another post.

Pathu Sutariya

Codelab7

<p>A handy Plugin that help you to set a post to child post of another post. which let you create a sub posts, numbered posts etc.<br />
Same as page, You can make any post a child post of another post and setup hierarchy. This plugin is developed by <a href="https://codelab7.com" rel="nofollow ugc">Codelab7</a></p>
<h3>Requirements</h3>
<ul>
<li>WordPress 5.0 or greater and PHP 7.0 or up required</li>
</ul>


Alternatives to Post Hierarchy

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