Add code to functions.php in Wordpress Avada theme and test works with WooCommerce

At checkout we collect two emails during the checkout process. We have been sent some code by the custom fields plugin that will send the WooCommerce emails to two email addresses following checkout. We are looking for a developer to add this code and test that the WooCommerce order confirmation is sent to the two email addresses.

add_filter('woocommerce_email_recipient_new_order',
'additional_email_checkout', 10, 2);
function
additional_email_checkout($emails, $object){
$aditional_email = get_post_meta($object->id,
'field_name',
true);
if($aditional_email){
$emails
.= ','.$aditional_email;
}
return
$emails;
}