Plugin Content Not Appearing In Search

I understand your issue, By default, accordions data is saved under post meta fields, unlike the post content. You may not find accordions on default search results, but we have a solution. You will need to add the following code to your theme functions.php file.

https://gist.github.com/pickplugins/d5cb5e5c2c847b12829d0ab7539c8c0e

Documentation

https://pickplugins.com/documentation/accordions/faq/accordions-2/