We do not support FBM Fulfilled by Merchant data.
Amazon does not provide any detailed information on Merchant data as it is controlled by you manually.
Order information with merchant orders are accessible, however, there are no detailed stats like how many merchant sales you made last month or last year, what your current inventory is etc.
Gorilla ROI Addon for Google Sheets is best suited for FBA sellers.
What is Gorilla ROI?
Gorilla ROI automatically pulls Amazon data into Google sheets for you to make sense of the data without the inconvenience of manually downloading, sorting and updating spreadsheets.
Learn how you can centralize your data and use it to increase your ROI.