Hi,
I am also having a similar issue and would sincerely appreciate some guidance.
My document set up: Facing pages, starting on right.
My export: All Pages
Which leaves me with a single page PDF when viewing in a reader. I understand that I can adjust my viewing settings in a reader to 'show cover' while enabling a two page view, however I am trying to find out how I can set this in the document properties so it does this every time the file is opened, regardless of the reader. From my research I need to be able to adjust / set the files initial view settings however I cannot find a way to do this? It looks like I might need Adobe Acrobat Standard or Pro or some other third party utility to do this? I cannot find an answer to do this within Affinity Publisher? If anyone has any advice for this desperate self-taught newbie, your help would be greatly appreciated!