Remember to be clear about the title you held when describing experience gained in roles other than product owner. For example, it may be appropriate to describe experience gained as a business analyst responsible for duties similar to a product owner, but it is important to note the title you held at the time.

I was the Product Owner for a product that maintained contract data for services sold to external customers. It generated legal documents and invoices. It also integrated with several downstream systems that required active service contracts for access to various features.

I also served as a Product Owner for an internal resource scheduling system that tracked assignments and the hours spent on them and then generated payroll data and customer invoices. This product required several integration efforts, and we used a scrum of scrums model to collaborate and scale the development for these projects.