zackdesign

RSS Image Widget fetches images from any RSS/Atom feed that uses enclosures and displays them in a responsive grid with a built-in lightbox. Works as both a classic widget and a Gutenberg block.
Features:
<ul>
<li>Widget + Block — Use in sidebars (classic widget) or anywhere in the block editor</li>
<li>Lightweight — No jQuery, no external CDN. Just a tiny vanilla JS lightbox (~2 KB)</li>
<li>Responsive grid — CSS Grid layout adapts to any container width</li>
<li>Lazy loading — Images use native browser lazy loading</li>
<li>Accessible — Lightbox supports keyboard navigation (Escape to close)</li>
<li>Zero configuration — Just add a feed URL and go</li>
</ul>
Upgrading from v2.x:
The Bootstrap classes (<code>row</code>, <code>col-xs-12</code>) and external Lightbox2 CDN have been replaced with clean semantic HTML, a responsive CSS Grid layout, and a bundled vanilla JS lightbox. If you had custom CSS targeting the old classes, you will need to update it to use the new <code>.rss-image-gallery</code> BEM classes.

RSS Image Widget

Display images from an RSS or Atom feed as a widget or block with a lightweight lightbox gallery.

arena

Allows you to display the last items of several feeds in your dashboard
For each widget, aggregates as much feeds as you like (1 to 10) and display the last items (3 to 99). Up to 9 different DashPress widgets on your Dashboard !!!
Version 5.0 includes a complete widget javascript review !
<h3>Next features</h3>
to be decided
<h3>Privacy</h3>
This plugin : 
1. display images from external sites if set. This external service might collect personal data. 
2. is storing data : 
 * parameters for each dashpress widget 
 * caching rss feeds 
3. is using external libraries 
 * SimplePie (php class) provided by WordPress (core)

DashPress

Allows you to display the last items of several feeds on your dashboard

RSS Image Widget vs DashPress