Website side. A complete SEO of your business website, including a high level of content reliability, detailed localization with geo-identifiers, and relevant structured data, can help the Google Knowledge Graph API get information about your business’s localization and the products/services the business offers.
The side of the business profile panel. Creating content that matches the website’s content, including business identifiers, and products or services details can help.
When creating a linked product, both of these parts will create the identity of your business and products in the SERP.