The plugin will provide a collapsible HTML block with a element that will be shown when the element is collapsed. Inside the details you can put all possible editor blocks you want.
The plugin is provided without styling and relies on (child) theme developers to implement CSS for further visual styling.
1.0.1
Minor updates for WordPress 6.2
1.0.0
Initial release
Stable
1.0.0
This plugin is available for download for your site.