Document for PO Approval Wave 2

Hello,

I am configuring Wave 2 Purchase Order Approval. Now I want to plug the app to backend workflow.

In  Fiori Document site:

I see:

Configuration

To enable Approve Purchase Orders, you must perform the following configuration task:

Specify the workflow tasks that are relevant for approving purchase orders. You do this in Customizing for Materials Management under PurchasingPurchase OrderApprove Purchase Orders AppSpecify Workflow Task IDs for Approve Purchase Orders App.

But I am not able to see this category. Could you please help point where it is?

Or could you please let me know how to configure the Workflow part? I tried with the way in Wave 1, which does not work.

Kind regards,

Kenny