Unlock the Hidden Power of Schema Markup on Your WordPress Site – What You’re Missing Could Skyrocket Your SEO!

You can then add the additional information for the schema type you’ve selected.
For example, if you selected the recipe type, you can add the preparation time, cooking time, and other details that will be displayed in the rich results in the SERPs.
Click the “Save for this Post” button when you’ve finished.

You can then repeat the above to add structured data to any new and existing content on your site.
The Titles & Meta section of the Rank Math SEO documentation has the full details on adding structured data to WordPress with this plugin.