плагин Show / Hide Section Block не работает

Hey @irina1967,

The Show/Hide Section block plugin comes with one block, i.e.,the show hide group, and within it are other blocks: show hide section, show hide summary, and show hide details.
Try searching for it. If you are not able to locate it, create a post in their support thread, and the plugin devs should be able to help you.

Best of luck.