The agile team concept is one of the Scrum practices that might be difficult to fully grasp. For me at least,this is a continuous learning experience.
It is also one of the most important things to get right: and where many agile transitions go wrong. Cross-functional, self-organizing teams runs counter to the classical matrix management structure with project teams.
Many organizations do sprints, Scrum boards, burndowns, and so on, but don’t change their mindset much.