We are trying to see how we can enable the output of the page to show two pages rather than one in landscape orientation per sheet
I am guesing there should be something in the page media options

Prince doesn't do imposition / n-up printing, this is handled by the PDF printer or third-party tools.

However you can change whether the viewer defaults to showing one or two pages at a time on the screen using the prince-pdf-page-layout property:

https://www.princexml.com/doc/css-props/#prop-prince-pdf-page-layout