Sales Layer channel allows the configuration of additional fields in the products and variants tabs:
The product fields will be generated as additional product fields, and the ones belonging to variants, will be the configurable attributes.
In order to have an attribute as configurable, it must be created as a Dropdown, Visual Swatch or Text Swatch:
In order to show this Dropdown in the channel, the attributes need to be created in Magento as global:
When there are existent attributes in Magento 2:
Their value will be added as a new option in the attribute, and will be generated as product/variant:
The attribute needs to be assigned to the attributes set where the product/variants belongs to:
Variants are required to have the configurable attribute chosen in Magento 2 configuration of the channel:
In case the attributes are not generated when the sync begins, variants won’t be linked to its parent product.