cutch

Using either ctrl+c and ctrl+shift+v (Configurable from settings), or the the copy styles button in the block editor. Copy and paste the type and styles from one block to another. 
Ex. Click a header block, press ctrl+c (to copy), then click a paragraph block, and press ctrl+shift+v.
Note: For apple devices use the cmd key instead of ctrl. ex. cmd+c and cmd+shift+v.
<h4>Features</h4>
<ul>
<li>Convert to blocks which do not have a direct conversion</li>
<li>Copy styles from multiple blocks to another set of blocks, or one block to many</li>
<li>Retain block attributes during conversion. Ex. h6 for headings, or css classes.</li>
</ul>
<h3>Issues</h3>
Please post an issue in the <a href="https://github.com/Cutch/copy-blocky/issues" rel="nofollow ugc">GitHub Issues</a>

Copy Blocky

Copy and Paste Gutenberg blocks and styles.

Daniele De Santis

WP Add Custom CSS allows you to add custom CSS to the whole website and to individual posts, pages and custom post types (such as Woocommerce products). 
The CSS rules applied to the whole website will override the default stylesheets of your theme and plugins, while the CSS rules applied to specific pages, posts or custom post types will override the main stylesheet too.
The plugin works with the most popular builders, such as Elementor, Gutenberg and the Classic Editor.
You can edit the main stylesheet from the the “Add custom CSS” settings page. 
The plugin also creates a new “Custom CSS” box in the editing area to add custom CSS to specific posts, pages and custom post types.
Select the preferred CSS output method from the plugin’s settings page to ensure seamless integration with caching and minification plugins or to improve above-the-fold rendering performance.

WP Add Custom CSS


Says it has not been tested against recent versions, but it works great still. Simple and elegant solution. Sep 13 2024


Still works great

Add custom css to the whole website and to specific posts and pages.

Copy Blocky vs WP Add Custom CSS