It would be helpful to augment the section on the embedded OG template with a basic directory structure. Currently, the documentation exemplifies the frontmatter like so

images:
- post-cover.png

This does not make clear where "post-conver.png" must be located so that the OG template can find it.

Also, the phrase

If page bundles are used and the images array is empty or undefined, images with file names matching feature, cover, or thumbnail are used for image metadata.

is too vague, imo. I assume it means to say, "If the current page is part of a page bundle", because the passive voice used here would imply "If page bundles are used anywhere on the site", regardless of the current page. Also, it is not clear what happens if the current page is not part of a page bundle.