Seems like new host and platform requirements have changed according to doc published on Dec. 1, 2017 here https://docs.microsoft.com/en-us/office/dev/add-ins/overview/office-add-in-availability
We were told in a report from the MS Seller Dashboard to use add-in commands and make it compatible with Excel 2013, iOS Mac and the iPad.
However, according to the doc above by Microsoft, add-in commands are not listed for Excel 2013 and iOS.
The add-in availability Chart is gone https://dev.office.com/add-in-availablity
Therefore, what are the new testing criteria for the Excel add-in for Office 365?