lastsplash (a11n)

Beginning with WordPress v6.3, a Details Block is included in WordPress. This plugin is no longer needed.
The block allows you to easily show and hide content using built-in browser functionality. It doesn’t load any external JavaScript and relies on native HTML functionality. You can configure the appearance using built-in editor controls.
It uses the HTML <code>details</code> element to show and hide the content.

Details: Show and Hide

George Mamadashvili

You can use this block to hide and reveal content as needed. Create FAQ pages, hide spoilers in posts, or create simple accordion elements.
The block uses <code><details></code> and <code><summary></code> HTML elements and doesn’t require any additional JavaScript or CSS on the theme side.

Details: Show and Hide vs Toggles