Add author email to a New Order WooCommerce email

So I have been trying to add WooCommerce product author email as a recipient in “new order” email. I used the code below but it does not trigger to author, what is missing?

add_filter( ‘woocommerce_email_recipient_new_order’, ‘new_order_email_to_author’, 9999, 3 );

function new_order_email_to_author( $email_recipient, $email_object, $email ) {
$email_recipient .= get_the_author_meta( ‘user_email’, $product->post->post_author );
return $email_recipient;
}