Amazon Fire HD Max 11

I have had two older Amazon Fire devices that I was able to install Google Playstore on and then subsequently install 1Password.  The lastest is the HD 10 Plus (11th generation), it is running 1Password 8.12.2 (which I assume is somewhat dated ) which as far as I can tell is fully in sync with 8.12.12 that are running on my Pixel phone and Windows laptop in terms of user-ids, passwords and notes for all of the vaults that I have created.

When I open Google Playstore on the Max 11 and search for 1Password, it finds it but includes a message that "This app won't work on your device".  This Interestingly enough there are a whole host of other password managers that appear to work including Bitwarden and Keeper.  I was able to install Bitwarden (which I would obviously rather not use) so it isn't a case of Playstore not running.  I was also able to use Playstore to install MIcrosoft Excel.

Note:  The Bitwarden and Microsoft Excel apps are not part of the Amazon app store, so its not like I made a mistake.  

I don't understand why 1Password (and LastPass) are exceptions.  It's almost like Playstore honors a not supported flag set by the owner of the app.  If this is the case is there anyway this flag can be taken off?

Any suggestions?