Thanks. It is the "Amazon - Home, Home Decor, Kitchen & Garden" template.
Just to clarify, it is not grouped products in nopCommerce, but Product Attributes of a single product. I am not sure it you meant this or variations in Amazon.
So it would be ideal for it to apear like this listing in Amazon - https://www.amazon.co.uk/dp/B00HQHBNFG But if it was seperate listings then that is OK also.
I know a variation in Amazon like above is created in the feed by a separate row for each listing and then another row to group them together.