We have these excel files as attachments and when people view them on an iOS device they are properly displayed but when people view them on an Android device, the app says 'No Preview available for this file. Please open in alternative application'.
Opening in another application is also something that doesn't work but for the scope of this question I want to focus on why the preview doesn't work.
I am unable to find any documentation or insight from Salesforce if there is a difference in functionality between the iOS and Android app.
What could the reason be why this doesn't work and is there something we can do to make it work ? We can't force our users to use iOS.