Shipping settings are found under the FBA or Merchant Fulfilled column group in the offer values in the Shopify Marketplace Connect Grid and the FBA or Merchant Fulfilled settings in Single-edit Mode.
FBA or Merchant Fulfilled
Select whether the product will be fulfilled by you (Merchant) or if Amazon is warehousing and fulfilling the product - Fulfilment by Amazon (FBA). FBA vs FBM
Applicable Dangerous Goods Regulations
Choose from the dropdown list if applicable to your product per Amazon regulations.
Shipping Group or Shipping Templates for FBM Listings
Amazon Shipping Groups or Shipping Templates are your Shipping Settings that are being applied to your product listings, login to your Seller Central Account and define the rules for your Shipping Rates and Shipping Locations.
You may watch this short video from Amazon on how to manage your Shipping Groups or Shipping Templates: Understanding Amazon shipping templates
Also, this support page on Amazon should help you define your Shipping Rates or your Shipping Locations: Set your shipping rates
Note that if you leave the Shipping Group Blank, Marketplace Connect will use your Default Shipping Group or Shipping Template in Seller Central. See this link for more info on how to set a Default Shipping Group: Set or change the default shipping template
For Merchant fulfilled, Marketplace Connect by default will send the "Default Shipping Template" (that is created by the merchant directly in Seller Central) on the listings. This will happen if the Shipping group field is left blank.
There is no ability via the Amazon API to create Shipping rules, only apply them. Hence, they need to be set on Amazon directly.
If you want to set a different shipping template to the default template against a (set of) product(s), you need to type in the exact name of the shipping template you have set on Amazon (case sensitive) in the shipping group field. It can be bulk edited using filters if required.
Dispatch Time
Not relevant for FBA. The number of days after receipt of an order that the product will be dispatched.
For further assistance, please reach out to marketplace-connect@shopify.com