BjornW

This plugin will disable the Core Block Patterns, included with WordPress 5.5 (and higher versions). Even if your theme enables them, this plugin will overrule your theme and disable Core Block Patterns. It will not disable any custom or plugin Block Patterns. The plugin has no settings and should work in WordPress MU as well as single WordPress installations.
If this plugin meets your expectations and you use it commercially 
please consider a donation to one of these organisations or your country’s equivalents:
<ul>
<li><a href='https://www.msf.org/' rel="nofollow ugc">Medicines Sans Frontiers</a> </li>
<li><a href='https://fsfe.org' rel="nofollow ugc">Free Software Foundation Europe</a></li>
<li><a href='https://https://www.bitsoffreedom.nl/english/' rel="nofollow ugc">Bits of Freedom</a></li>
<li><a href='https://edri.org/' rel="nofollow ugc">European Digital Rights (EDRi)</a> </li>
<li><a href='https://fsf.org' rel="nofollow ugc">Free Software Foundation</a></li>
<li><a href='https://eff.org' rel="nofollow ugc">Electronic Frontier Foundation</a></li>
</ul>
<h3>Notes</h3>
Credits:
Icon in the WordPress plugin repository and found in /assets/icon* uses <a href="https://www.toicon.com/icons/afiado_build" rel="nofollow ugc">‘To Build’ icon</a> licensed under a <a href="http://creativecommons.org/licenses/by/4.0/" rel="nofollow ugc">Creative Commons Attribution 4.0 International</a> License. Derived from the series <a href="https://www.toicon.com/series/afiado" rel="nofollow ugc">‘Afiado’</a> By <a href="https://www.toicon.com/authors/susana" rel="nofollow ugc">Susana Passinhas</a>
Thanks Susana Passinhas and to[icon] for sharing your work!
WordPress repository header image found in /assets: 
<a href="https://archive.org/stream/annualreportofbu38smithso/#page/359/mode/1up" rel="nofollow ugc">‘A cropped elment from Fig 173 from page 359 of “Annual report of the Bureau of American Ethnology to the Secretary of the Smithsonian Institution” (1895)’</a>. No known copyright restrictions. Cropped by BjornW. 
Found via Flickr Commons – flickr.com/commons on Internet Archive.org (thanks!)

Disable Core Block Patterns

This plugin will disable the Core Block Patterns, included with WordPress 5.5 (and higher versions).

chrismademe

Block Patterns are great, but registering them can be a little tedious. This plugin fixes that by allowing you to create and register Block Patterns using the Block Editor itself! You simply add the blocks you want to use as a pattern, add some (optional) information about them and you’re ready to start using them in your posts and pages.

Block Patterns UI

A simple UI for creating and managing Block Patterns

Disable Core Block Patterns vs Block Patterns UI