The Nexus Guide states that the Nexus Integration Team "might perform work from the Product Backlog". What does this mean?
Can they perform some actual integration work, or tool creation, or implement some other kind of PBIs, ahead of a sprint? If so, it's pretty weird that work is performed outside the regular planning and review processes.
If work can be performed ahead of the sprint. What kind of work are we talking about, and what are the rules?
Or is this just preparation work on the product backlog level?
This is not clear in my opinion.