#set page(
  margin: (
    inside: 0.5in, outside: 1.5in,
    top: 1in, bottom: 2in
  ),
  paper: "a5"
)
#set par(justify: true)

#lorem(600)
#page(flipped: true)[#lorem(300)]
#lorem(350)

Currently, the margins of flipped pages are not affected by page.flipped, so that the example document looks as follows:

Is there a way to fix margins of flipped pages, so that they will look as follows instead?