I’m not seeing a meta description in the section in the source code of my site
This article is about the source code of your site. An example of the source code that should appear in the < head > section:
<meta name="description" content="Preferred description goes here"/>
A. Check your theme's
header.php file for a call to wp_head(). This function is required to output the Yoast SEO meta tags.
B. Confirm that a meta description has been added directly to the Yoast SEO metabox on the individual post or page.
C. Verify that a meta description template has been added in the Yoast SEO settings under Admin > SEO > Search Appearance for the content type in question.