WC Discord invite is a free WooCommerce integration that sends an email to your customers when their order status changes according to the integartion settings. The email sent includes an invite to your Discord server.
You can configure it by going to WooCommerce > Settings > Integration > WC Discord Invite and filling in all the details. The fields are all required. Once that is done, configure the email settings in WooCommerce > Settings > Emails.
Te puedes descargar este plugin para utilizarlo en tu instalación autoalojada de WordPress.