You can create offer templates for the Dia channel on StoreAutomator to populate your offers on the Dia marketplace.
Here are the steps you need to follow:
1- Go to “Settings>Templates” and click “Add Template”
2- Select “Dia” and price or quantity specific feed type. Then, click create. Quantity and price templates are the same offer templates. However, you need to create and assign all of them to the channel.
3- Find and change the “product_id” field. It should be mapped to “Product.Sku”.
4- Select the “Quantity” feed type and create a “Quantity” feed template as well.
5- Save the templates and assign them for the channel from the “Channel Settings>Template”.