Scaled Agile Framework (SAFe) teaches this differently, and I think it’s one of the weakest points in the entire framework. In SAFe, product managers are the managers of product owners and are responsible for external-facing interactions and work. They speak to the customers, they define the requirements and scope of the products to be built, and they communicate these down to the product owners. The product owners are internal facing, defining the components of the solution and working with developers to ship it.