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).

Sadik Multani

Sahil Multani

Key Features
<ul>
<li>Easy to create custom block patterns</li>
<li>Add any type of keywords to find easily in the block inserter</li>
<li>Create custom pattern categories</li>
<li>Assign your patterns to single or multiple categories</li>
<li>Browse readymade block patterns from WordPress.org patterns library and use it</li>
<li>Browse block patterns by specific Author</li>
</ul>
<h3>Getting Started</h3>
<ol>
<li>Find and click on the ‘Block Patterns‘ menu in the admin sidebar.</li>
<li>Click on the ‘Add New‘ button.</li>
<li>Write your pattern name.</li>
<li>Start writing or choose any blocks you want to be part of your pattern.</li>
<li>Publish your pattern</li>
<li>Open any page/post and select pattern from the Block Inserter under the pattern tab.</li>
</ol>

Block Pattern Builder For WordPress – Boost Up Gutenberg Patterns

Create custom block patterns and browse ready-made patterns from the WordPress.org library to enhance your Gutenberg block pattern collection.

Disable Core Block Patterns vs Block Pattern Builder For WordPress – Boost Up Gutenberg Patterns