If you're an agency that needs to use a catalog on behalf of another business, you can request access to the product catalog.

1. Open Business Manager Settings.
2. Select your account.
3. Click Data Sources.
4. Click Catalogs.
5. Click + Add, and choose Request Access to a Catalog.
6. Click Add Page to add an existing Page, or Create Page to create a new Page. Your business needs a primary Page to request access to Pages, ad accounts and other assets that belong to another business. They will verify your business through your primary Page. Your primary Page should be the Facebook Page that best represents the business you work for.
7. Follow the instructions on the screen to request access to the catalog.

You'll now have access to the catalog in Business Manager.

* Nguồn: Facebook