remove-store-pages-from-sitemap-and-add-noindex-meta

add_action( 'init', function() {
    global $WCFMmp;
    remove_action( 'init', array( $WCFMmp->wcfmmp_store_seo, 'register_sitemap' ) );
}, 9 );

add_filter( 'wpseo_sitemap_index', function($i) {
    global $WCFMmp;
    remove_filter( 'wpseo_sitemap_index', array( $WCFMmp->wcfmmp_store_seo, 'wcfmmp_add_sellers_sitemap' ), 100 );
    return $i;
}, 99);

add_filter( 'wpseo_robots', 'yoast_seo_robots_for_venders' );
add_filter( 'wpseo_googlebot', 'yoast_seo_robots_for_venders' );
add_filter( 'wpseo_bingbot', 'yoast_seo_robots_for_venders' );

function yoast_seo_robots_for_venders($robots) {
    if (wcfm_is_store_page()) {
        return 'noindex, follow';
    }
    return $robots;
}