On Amazon Sync / FBA Sync, it's possible that your Prestashop catalog does not contain a particular product.
In this case,
Mapping state = Unavailable and you have an option to import that product into your Prestashop catalog.
Perform the import action
You can only import product if it is not existed in your Prestashop:
Bulk action is also possible.
Create product attributes as well when importing product
Amazon products usually have attributes, such as capacity, flavor, wattage, voltage, etc.
If your Prestashop does not have all the product's attributes while importing, the module can automatically create the missing ones, by enabling the setting Create Product Attribute On Sync on Module Configuration > Products