Alvaro

<a href="https://gutenberg-showcase.melonpan.io/melonpan-block-code" rel="nofollow ugc">Demo</a> – <a href="https://melonpan.io/wordpress-plugins/melonpan-block-code" rel="nofollow ugc">Documentation</a> – <a href="https://github.com/garciaalvaro/melonpan-block-code" rel="nofollow ugc">GitHub</a>
Block to display code, with highlighted syntax, which can be copied to the clipboard.
<h3>Features</h3>
The block comes with the following settings:
<ul>
<li>Code language: JavaScript, CSS, PHP, etc. <a href="https://prismjs.com/#languages-list" rel="nofollow ugc">Full list of languages</a>.</li>
<li>Color theme</li>
<li>Label: Top left label that can be customized. By default the code language.</li>
<li>Copy button: Top right button to copy the block content.</li>
<li>Padding</li>
<li>Border width and Border radius</li>
</ul>
<h3>Usage</h3>
The block can be found inside the blocks inserter menu under the Melonpan Blocks category. 
Once added in the post you can edit its settings on the Editor sidebar under the Block settings panel. 
Switch between the previewer and editor views to edit the code and see its styled output.

Melonpan Block – Code

Block to display code, with highlighted syntax, which can be copied to the clipboard.

alkanesolutions

Alkane Code is a user-friendly, lightweight code editor for TinyMCE that adds ‘language-‘ classes to HTML code elements. It can be used to add inline code as well as block code, and syntax highlighting at the front-end is performed using Prism.js with auto-loaded languages. It does not support the Gutenberg editor. You will need to install the ‘Classic Editor’ plugin to use this code editor.
More Information
<a href="https://www.alkanesolutions.co.uk/blog/2019/07/06/alkane-code-tinymce-code-editor-prism-syntax-highlighting/" rel="nofollow ugc">Alkane Code homepage</a>

Alkane Code

A TinyMCE code editor with Prism syntax highlighting.

Melonpan Block – Code vs Alkane Code