Amazon Prime Video watched history clearing

How do you clear the Watched Video History of the iPad Mini (5th Gen) device? The history is within the Amazon Prime Video App.  There are no settings to clear the “Watched History”, only the Searched History (clearing searched history will not clear watched history).  Amazon support has not been able to answer this question. I have uninstalled the App in an effort to clear all the data. When the Prime Video App is reinstalled it still has watched history showing pages of watched videos. I can go to a windows 10 computer into my Amazon account and clear the watched history on my Amazon prime account and it is deleted on all devices except the ISO iPad Mini. Any suggestions?