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Awesome.

So on those lists, set your content type to “None”.

Then, do this:

add_action( 'wpsp_before_content', function( $settings ) {
    $targets = array(
        '12345', 
        '34567', 
        '56789',
    );

    $content = get_post_meta( get_the_ID(), '_yoast_wpseo_opengraph-description', true );

    if ( in_array( $settings['list_id'], $targets ) && $content ) {
        echo $content;
    }
} );

So that should do the content.

For the featured images – do existing featured images exist?