Why is Project Team missing from Project Update Wizard?

We are on PUM 51 and the PeopleBooks documentation shows that "Project Team Member" should be an option for the "Update Type", however, I do not see it in our environments or the DEMO environment. This leads me to believe that there is setup missing or functionality not turned on. Is there set up that needs to occur in order for this option to appear? Can someone point me to the functionality that I may need to turn on for this to appear as an option?

DEMO ENVIRONMENT:

PeopleBooks Documentation:

Thanks!