Related Product Of Vendor And Related Product Of shop

add_action('woocommerce_after_single_product_summary', 'woocommerce_after_single_product_summary_callback');

function woocommerce_after_single_product_summary_callback() {
    $product_id = get_the_ID();
    $author_id = get_post($product_id)->post_author;
    $args = array(
        'post_type' => 'product',
        'posts_per_page' => -1,
        'author' => $author_id
    );
    $loop = new WP_Query($args);
    if ($loop->have_posts()) {
        while ($loop->have_posts()) : $loop->the_post();
            add_filter('transient_wc_related_' . get_the_ID(), 'wc_related_callback');
        endwhile;
    }
    wp_reset_postdata();
}
function wc_related_callback($values) {
    $product_id = get_the_ID();
    $author_id = get_post($product_id)->post_author;
    $args = array(
        'post_type' => 'product',
        'posts_per_page' => -1,
        'author' => $author_id
    );
    $vendor_products = array();
    $related_array = array();
    $loop = new WP_Query($args);
    if ($loop->have_posts()) {
        while ($loop->have_posts()) : $loop->the_post();
            $vendor_products[] = get_the_ID();
        endwhile;
    }
    foreach($vendor_products as $vendor_product){
        $related_array[] = $vendor_product;
    }
    foreach ($values as $value){
        $related_array[] = $value;
    }
    wp_reset_postdata();
    return $related_array;
}