How are custom reports created from B2B sites for specific customers? Do we create them in SAP HANA SQL queries and upload that code? Or are they built directly on the site in another language?

You have multiple options to create custom reports:

1. A simple tabular-style report is supported in our Customer Portal.
2. If you have multiple sites, you are automatically running our Professional Package in which the Azure PowerBI platform is integrated. PowerBI enables both operational and analytical reporting and predictive analytics.
3. Crystal Reports is supported for PDF extraction from SAP (the most common reporting method)