Feature to set more pages next to each other

[RaSu]

When I do covers for books, is not possible to export Artboards or Spreads with a bleed in Designer. Publisher is missing feature set more pages side by side - this is not the solution too.

This is file in Designer - bleed is not showed, but objects are with bleed.

This is bad export without bleed.

This is correct export from InDesign.

Could you please add this feature? I see it as very useful. it does not matther if in Designer or in Publisher.