Hi @whitehat123
The og:image tag will prioritize and fallback to certain image outputs as defined here:
-A user-defined image “Facebook image” in the Social tab of the Yoast metabox.
-A user-defined “Featured image” for the page (only for posts).
-A prominent image from the page’s content.
-The “Social default image” from the template in Search Appearance.
-The site’s fallback/default social image (set at SEO > Social > Facebook > Default image).
So if you want to ensure that it uses the first image in the content and not the featured image, you’ll likely have to set that in the Facebook section of the Social tab in the Yoast SEO meta box.