How to use page numbering in both header and footer at once?

[xkevio]

You can either set header and footer manually with set page(..) or use numbering and number-align too for the current page count.

#set page(
  numbering: (x, ..) => [Page -- #x],
  number-align: center + top,
  footer: context [
    #set align(right) // Could also use #{ int(counter(page).display()) + 1}.
    Continue Page -- #numbering("1", ..counter(page).at(here()).map(x => x + 1))
  ],
  height: auto
)

#lorem(20)

#pagebreak()

#lorem(20)