Unable to delete or reject old expense reports

Our payroll manager is not able to reject or delete any old expense reports for Termed employees. She has the Expense Auditor Role. Is there another role she should have to provide actions she can take to clear out of the Expenses module? There are a lot of very old expense reports (from 2019) that seem to be stuck in "awaiting receipts" status.

We need a way to clear these out so we can clean up the expenses queue.

Thanks