By default, WooCommerce does not display product thumbnails in the order emails.

With the following snippet, you can change that behavior and display product images next to the product name in the order email item table.

PHP Snippet: Show Product Thumbnails in WooCommerce Order Emails

/**
 * Show Product Thumbnails in WooCommerce Order Emails
 * Compatible with WooCommerce 7+
 */
add_filter( 'woocommerce_email_order_items_args', 'custom_show_product_images_in_email', 9999 );

function custom_show_product_images_in_email( $args ) {
    $args['show_image'] = true;
    return $args;
}

Where to Add This Code

Add the PHP snippet to your child theme’s functions.php file or a custom plugin.