Certain functions take a day or two to retrieve.
Data is never provided instantly by Amazon and it takes some time to backfill – especially if you are a big seller.
Data like reviews and BSR are not provided by Amazon. We use our own algorithms to import the information which takes time once you have connected. It is not instantaneous.
We get data via the API and the data import is not an instant process. Can take up to 1 day for the data to be fully imported, prepared and ready as we pull in the past 2 years of data for people.
Go to menu > Gorilla Sheets > 3. Check status of data import. When it is all done, it will show 100% like in the screenshot below.