custom email template

hey ,?

Unfortunately, after visiting (back-in-stock-notifier-for-woocommerce\templates), I didn’t find any templates for email.

I’m wondering if there is any way I can code my own template. or trigger a hook (that will be triggered after the email is ready to be sent), so I do something like this.

function nafSendNewOrderEmails($order_id){
 // code //
      naf_send_email($order->get_billing_email() , $subject , 'woo_custom_emails/local_shipping/on-local-shipping');

}
add_action("woocommerce_order_status_changed","nafSendNewOrderEmails" , 10 , 3);

Thank you for the great plugin.