A Kanban Board is an effective tool to self-organized control “work in progress” in small and mid-sized initiatives by the team. Everybody directly sees the tasks to do, the ones in progress or done. You only need a bit of discipline to have everyone place his task appropriately to progress on the board, but that’s not all too much, and the advantages for the team work are obvious.
Project management is needed when the amount of tasks gets bigger, when someone is required to keep oversight, to draw up the tasks on the Kanban Board and coordinate their execution. Or if there are multiple teams with individual Kanban Boards where the deliverables need to be put together at certain points. It is the (well-versed) project lead’s decision to apply a classical planning and agile execution in a hybrid way or control with a „Scrum of Scrums“ – according to his preferred project approach.