How many Product Backlogs are there in a Nexus framework?

In the Nexus framework, there is only one Product Backlog that serves the entire Nexus. This singular Product Backlog is crucial because it facilitates collaboration between the various Scrum Teams within the Nexus, allowing them to coordinate their efforts and align their work towards a common goal. By maintaining a single backlog, teams can ensure that priorities are shared and that dependencies are managed effectively. The integration of work from multiple teams into one backlog enhances transparency and helps in optimizing the overall delivery of the product. This approach also simplifies the management and prioritization process since all items that need to be developed are clustered in one place, eliminating the complications of multiple backlogs for different teams.