Query on Iprocurement Ordering through Stores

We are implementing Iprocurement (12.1.3).  With the current requirement  Only Expense Items  (Non Inventory   - Categories only will exist without reference to Items)are going to be ordered through Main Stores. No Items are assigned to these Categories and  Have to be ordered with Category in the pruchase requistion. ( Blankets are going to be created for these categories)

Created Shopping categories , mapped these with Purchasign categories, created Hierarchy, etc. Included all the categories in Local Content Zone.Local content Zoen is attached to main stores. Now not able to find the Shopping categories in the  Main stores . Can anyone confirm  - Requisition based on the Shopping categories can be created from Main store   without reference to Item. We can order this with Core Purchasing forms and Non Catalog requistion from Iproc - but here the Category referenced is Purchasing Category and not the shoppign category.