aegypius

This plugins allows display of deviantArt’s feeds such as Journals, Favourites and Galleries into widgets. Cache and thumbnail generation is supported.
This plugin is actually in ‘Beta’, many changes can occure during the next releases.
<h4>Testers</h4>
<ul>
<li><a href="http://hokuwo.de/" title="Wolfsgeheul" rel="nofollow ugc">Honigkuchenwolf</a></li>
<li><a href="http://www.flex-it.fr/" title="Work It Make It Flex It" rel="nofollow ugc">Flex</a></li>
</ul>

deviantART Widgets

Displays deviantART feeds as wordpress widgets

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.

deviantART Widgets vs RSS Image Widget