How to create a custom report in the Order section and put into the attachment or Download it by using a BP

Hi, all mentors

I'd like to generate an Excel report (using the Excel Report Builder app) based on the “Products in Orders” detail within the order section by triggering a button. I already know how to create the report, but I'm not sure how to automatically upload the generated file to the Attachments section.

Could you please explain how to configure this in the business process?