Open Tasks and select Insights at the top.
What you see
Task status overview shows all tasks in view, how many are overdue and the share completed on time. The bar splits them into overdue, to do, waiting for approval, completed late and completed on time.
Task status by person shows the same split for each colleague. Unassigned collects the tasks that have no one assigned yet: assign those first.
The By person table lists each colleague's tasks, their on-time percentage, and how many are overdue or waiting for approval. Select a column to sort, for example by overdue.
Follow up
Select a person to open their tasks and follow up from there.
Use Add filter to focus on one workflow, entity, country or due date, so the figures cover exactly the work you manage.