I am new to CPQ and trying to replicate CPQ quote to S4 via CPI, Currently standard xml which is sent from CPQ does not contain attribute selected and value at each item level
To replicate attributes/attribute values selected in CPQ configurator to S/4HANA, CPQ Professional version is required. The prerequisite is Variant Configuration (VC or AVC) has been enabled in S/4HANA and integration to SAP Variant Configuration and Pricing (CPS) has been setup correctly.
If VC is not utilized in S/4HANA, items in Quote will be replicated as simple product instead of configurable products. The attributes/attribute values will get missing unless you have marked them as "show as line item" in product attribute definition, to make them explicitly shown as Quote items.