Import BOM structure assets into CPQ via the CSV import

I am trying to use the CPQ REST API process for importing a CSV file of asset records from an external system into the CPQ asset repository. Our CPQ implementation uses a hierarchical BOM definition via the BOM DEF data tables, and leverages CPQ system config flows.

I have a sample asset record from an external system, and have configured a matching sample asset in CPQ using the configurator. With the Export Asset CSV process, I've used the CPQ-configured asset as a template for constructing the import file for the asset from the external system.

When I run the import process on the CSV file, the file is processed successfully, and I can see in the customer workbench the imported asset was created, and appears to have the correct hierarchy.