store-link-on-order-thank-you-page

add_action('woocommerce_order_details_after_order_table', function($order_id) {
    if( is_wc_endpoint_url( 'order-received' ) )  {
        $order = wc_get_order($order_id);
        $items = $order->get_items('line_item');
        $vendors = array();
        foreach ($items as $order_item_id => $item) {
            $line_item = new WC_Order_Item_Product($item);
            $product_id = $line_item->get_product_id();
            $vendor_id = wcfm_get_vendor_id_by_post($product_id);
            if ($vendor_id && !in_array($vendor_id, $vendors)) {
                $vendors[] = $vendor_id;
            }
        }
        if(!empty($vendors)) {
        ?><p class="return-to-shop"><?php
            foreach($vendors as $vendor) {
            ?>
                <a class="button wc-backward<?php echo esc_attr( wc_wp_theme_get_element_class_name( 'button' ) ? ' ' . wc_wp_theme_get_element_class_name( 'button' ) : '' ); ?>" href="<?php echo esc_url( apply_filters( 'wcfm_return_to_store_redirect', wcfmmp_get_store_url($vendor) ) ); ?>">
                    <?php
                        echo esc_html( __( 'Return to ', 'woocommerce' ) . wcfm_get_vendor_store_name($vendor) . __(' Store') );
                    ?>
                </a>
            <?php
            }
        ?></p><?php
        }
    }
}, 1);