Aaron D. Campbell

A widget that displays rotating images from a post’s gallery in the sidebar of 
your site. You just specify the post or page, and it will cycle through all the 
images from the gallery of that post or page. you can have as many of them as 
you want on your site simultaneously. Requires PHP5.
In WordPress 2.6, another plugin of mine has been included into the CORE to 
allow these to be reorder your images to make them display in whatever order you 
prefer. Until then, go get <a href="https://wordpress.org/extend/plugins/reorder-gallery/" rel="ugc">Reorder Gallery</a>!

Gallery Widget Pro

A widget that displays rotating images from a post's gallery in the sidebar of your site. Requires PHP5.

DashboardTeam

Collapse It is a modern Gutenberg block that allows you to collapse or expand any content area with a smooth fade effect and a customizable “Show More / Show Less” button. The block is highly flexible, letting you set the collapsed height, button styles, and texts. It also features smart empty-content detection: if the block is empty (even if it contains an empty shortcode block), it will automatically hide itself, keeping your pages clean and professional.
Key Features: 
* Collapse/expand any content with a fade effect 
* Automatically hides when empty (even with empty shortcode or any dynamic blocks) 
* Customizable collapsed height 
* Fully customizable Show More / Show Less button (text, color, alignment, border radius, font size, padding) 
* Gutenberg block editor support 
* No tracking, no ads, no bloat 
* 100% WordPress Coding Standards compliant 
* Developer: Dashboard Team
<h3>Usage</h3>
<ol>
<li>Insert the “Show More (Collapse)” block in the editor.</li>
<li>Add any content (text, images, blocks, or even shortcodes) inside the block.</li>
<li>Adjust the collapsed height and button styles from the block settings panel.</li>
<li>The block will automatically hide itself if left empty (including empty shortcode blocks).</li>
</ol>
<h3>License</h3>
This plugin is licensed under the GPLv2 or later. See https://www.gnu.org/licenses/gpl-2.0.html

Collapse It – Show More/Less Expand Button

A Gutenberg block to collapse/expand content with fade effect, customizable height, and auto-hide when empty.

Gallery Widget Pro vs Collapse It – Show More/Less Expand Button