@deccybFrom my end, I cannot provide any help since this relates to entering information into Workday and not directly into SAP Concur. I don't know if there are others here on the Community that use Workday, so maybe they can provide some insight. The only thing I could guess at is for some reason the information from Workday hasn't fed over to SAP Concur yet for some reason.

You would be best to reach out to your company's SAP Concur internal site administrator. If you aren't sure who that is, then reach out to your manager, Finance department or maybe HR department.