Whatsapp Cloud API Devices
Open your browser & go to https://your-domain/user/whatsapp/devices
Or click to Devices from Whatsapp Module option from sidebar
Devices List

Create Device
Go to https://developers.facebook.com/ (opens in a new tab) and click My Apps
Create App
Click This Tab and click next
Click This Tab and click next
Click This Tab and click next
Enter The Details and click Create App button
Click Set Up button from the Whatsapp Card
Click API Settings
Generate Token and Copy the Keys
Add Platform Name
Paste the Copied API Token and keys
Copy the webhook url and verify token
Click to Whatsapp > Configuration
Click the verify and save button
make subscribe (messages, message_template_status_update) like the screenshot
after successfully its complete then you can see connected badge in the platform list page