Alex Mills

When adding a page, category, or any hierarchical custom post type or taxonomy to your navigation menu (Appearance → Menus), this plugin allows you to optionally automatically add all descendants (children) of that menu item as submenu items.
In short, you’ll no longer have to manually maintain submenus when you add a new child page to your site.

Add Descendants As Submenu Items

Still works great. Much better than Gecka Submenu - it doesn't break the layout on the menu screen and there's no unnecessary pro version upsell.  I hope this is updated at some point because its age is hiding it from WP's search results.



Works great and it's clean

Automatically all of a nav menu item's descendants as submenu items. Designed for pages but will work with any hierarchical post type or taxonomy …

cybokron

Jetpack’s Widget Visibility only supports “Include children” which covers direct children (1 level deep). It doesn’t include grandchildren, great-grandchildren, or deeper nested pages.
This plugin adds an “Include all descendants” option that includes ALL levels of nested pages — grandchildren, great-grandchildren, and beyond.
Features:
<ul>
<li>Show/Hide widgets based on conditions</li>
<li>Page visibility with full descendant support</li>
<li>Category visibility with hierarchy support</li>
<li>Hierarchical custom taxonomy visibility with descendant support</li>
<li>Post type conditions</li>
<li>Special pages: Front page, Blog, Archive, Search, 404</li>
<li>User role targeting (any selected role)</li>
<li>User state: Logged in / Logged out</li>
<li>Multiple conditions with AND/OR logic</li>
<li>Jetpack-free — no dependencies</li>
<li>30 languages included</li>
<li>Follows WordPress coding standards</li>
</ul>
Supported Languages (30):
Turkish, English, Spanish, German, French, Italian, Portuguese (Brazil), Portuguese (Portugal), Dutch, Polish, Russian, Japanese, Chinese (Simplified), Chinese (Traditional), Korean, Arabic, Hebrew, Swedish, Norwegian, Danish, Finnish, Greek, Czech, Hungarian, Romanian, Ukrainian, Vietnamese, Thai, Indonesian, Hindi, Slovak

Cybokron Advanced Widget Visibility

Show or hide widgets by page, category, taxonomy, post type, and user context with descendant support.

Add Descendants As Submenu Items vs Cybokron Advanced Widget Visibility