When importing variants through a CSV, only the parent variant is created and the child variants are being ignored.
- Vend for Mac or PC
This can happen if the SKU Generation settings is set to Generate by Name.
If you leave the sku column empty in your CSV file, Vend will generate SKUs using the variant name. As all the variants share the same name, only the first variant will be imported to avoid duplication.
Change the SKU Generation settings to Generate by Sequence Number rather than a name.