Where to find Tasks and Milestones of an archived Project

Where to find Tasks and Milestones of an archived Project

Where can I find and export the Tasks and Milestones of an archived project? When I attempt to export archived projects, the associated tasks are not included, and only the number of open and closed milestones is displayed. Additionally, exporting tasks separately only includes those from active projects. How can I export the tasks and milestones associated with archived projects?"