this is from Sridhar Katakam, this allows seopress to read Oxygen builder content. Get code snippets and add as a function.

gistfile1.txt

add_filter( 'seopress_content_analysis_content', 'sp_content_analysis_content', 10, 2 );
/**
 * Filter the analyzed content to add content from Oxygen editor.
 * @param  string $content Current content in the WordPress editor.
 * @param  int $id      ID of the current entry.
 * @return string          Modified content.
 */
function sp_content_analysis_content( $content, $id ) {

    // HTML of Oxygen's content.
    $cf = do_shortcode( get_post_meta( $id, 'ct_builder_shortcodes', true ) );

    return $content . $cf;

}