TradeGecko does not create products on Amazon and vice versa. We pull Amazon product only after you set up the integration. So if there are new products added on your seller central account or TradeGecko (after integration), you need to manually create the product or variant on the other platform with matching SKU.
There are 3 ways to publish variants to Amazon. These are:
Go to Inventory > Product > Variants. On the right-hand side of each variant field, you will see a drop-down box marked with an arrow. Click it and choose Amazon.
Publish in bulk
The process for bulk publishing is very similar to the process above. However, this time, check the box top right-hand corner to select all your variants.
Publish via CSV
If you have too many variants from different products that you need to publish, the best way for you to do so is by updating via CSV.
First, go into the Inventory section and click on Bulk Manage > Update Existing Products.
Choose the option "No, I need to download a list of my products".
Click on Sales Channels and choose Shopify.
Click "Build Product Sheet" and download the CSV generated. On the CSV, under the columns for Amazon, mark the variants as TRUE to publish.
Reupload the CSV file. Your variants have now been published.