Sure! Do you want it to be scaled-up a bit, to fit the taller paper extra width of the double-page? Here's a comparison between the current size and scaled-up: https://imgur.com/a/Yn5hgZs.
Are these margins large enough?
(Note that the right-hand side has to be fairly small, to fit long words and glyphs. That's why landscape uses uneven splits, and the default printable version is vertical.)