Issue with ECC IS Retail Products in CRM catalog

Hello experts,

My requirement is to integrate IS Retail products in a CRM B2B webshop catalog.

These are generic products that have characteristics linked to product variants.

After replication in CRM they show up as configurable products with variants, but products characteristics (like size or color) won't appear anywhere.

The goal is to be abble for each product to publish it in the catalog with its characteristics so that the customer can select them.

I already tried replication of objects OBJCL, CLASS or ATTRIBUTE.

Thank you