Approvers can perform this task.
As an approver, you can see an overview of all expense reports in Spend > Approvals > Search.
You can filter by cost object (if your company uses a cost object approval strategy) or employee (for line manager approval strategy). You can see an overview of all expense reports that you have to approve or have approved as well as of the status of each expense report.
Draft and approved expenses for a specific cost object
Expenses to be approved and rejected for a specific employee
Note: While you can approve expenses directly from the mobile app, you can’t view approved expenses.