To connect a catalog to your WhatsApp business account:
Go to Business Manager and select your business.
Click
Click WhatsApp Manager.
Click the account that you want to connect a catalog.
In the left-hand menu, click Catalog.
Click Choose a Catalog.
From the drop-down menu, choose the catalog that you want to connect.
Click View Catalog if you want to view or manage the catalog.
Click Connect Catalog.
The catalog is connected to your WhatsApp business account. You can start sending Single Product Messages and Multi-Product Messages to your customers and receive responses from them.