You can purchase WPNotif plugin from the link below:
WPNotif: WordPress SMS & WhatsApp Message Notifications
Wpnotif lets you send notifications using SMS or WhatsApp to your customers from your WordPress site. The plugin is also fully compatible with WooCommerce and you can setup automatic notification triggers for your customers whenever they create a new order or whenever the status of that order is changed.
https://codecanyon.net/item/wpnotif-wordpress-sms-whatsapp-notifications/24045791
Please refer to screenshot below:
Gateway URL Format:
Please replace with your own Wabot subdomain, instance id and also access token.