How to upload PR items through excel to My purchase requisitions app in S/4 public cloud?

I privation to make PR and wide upload PR items to "My acquisition requisitions" oregon "Manage acquisition requisitions" app by utilizing excel and postman app. 

After creating the PR, it volition spell for approvals arsenic per the PR workflow. After it is afloat approved, it should car person to PO, car GR/IR and straight spell to the outgo with nary manual intervention.

Point to note: We are not utilizing worldly successful PR but the abbreviated substance to participate enactment items. Therefore, determination won't beryllium immoderate merchandise maestro information oregon purchasing info. grounds changes imaginable to automate PR to PO.

SAP S/4HANA Cloud for Sourcing and Procurement