Unable to update Product master with single ODATA call for different entities

When trying to update the Product Master call using ODATA, we need to call the entities separately.

When selected the ODATA entity for update patch, sub levels are not appearing in the drop down for the linking.

Odata: https://my302823-api.s4hana.ondemand.com/sap/opu/odata/sap/API_PRODUCT_SRV

Actually we want to update Product Header(A_Product), Product Description, Product Plant and Product Valuations at a time instead of separate calls.

We have got all the entity levels for the “POST” while creating, but not for the update “PATCH”.