The export log shows a message like this:
Skipping product: 1/0 has no reference
This indicates that your product does not comply with the catalog structure necessary for export, it lacks the Reference field that matches the SKU on Amazon.
This is the most important field in order to be able to export your products, see validate your catalog structure page and apply these guidelines to all your products and combinations.
Example of Reference field missing for a product:
Example of Reference field missing for a combination:
