Create a Meta Business App

You need to create a application in your Meta Developer Account in order to get access to WhatsApp Business API Products.

Create your account on Meta Development Hub, if you do not have one yet.

Visit Meta Development Dashboard Apps Section

Create a New App

For WhatsApp Business App, select others here.

Select Business

Fill App Details

You can select the Facebook page of your business from the Business Portfolio dropdown.

Add WhatsApp Product to the Application Created

Get your Temporary API key, Test Phone Number, Text Phone Number Id and Whatsapp Business Account Id

You will be able to get a permanent access token once you get your WhatsApp Business Account verified.