When multiple Scrum Teams work on the same product, they share one Product Backlog that
contains all the requirements for the product. The Product Owner is responsible for ordering and
refining the Product Backlog items, but does not assign them to specific teams. Instead, the Scrum
Teams pull in work from the Product Backlog in agreement with the Product Owner and the other
teams, based on their capacity, skills, dependencies, and Sprint Goals. This way, the Scrum Teams can
self-organize and collaborate to deliver a coherent and valuable product Increment.
Reference:
The Scrum Guide, November 2020, p. 7-8
Can two teams work on one product backlog?, Scrum.org, January 6, 2020
