Hi Tarik2nu
welcome to this Apple (user-to-user) Community!
Re: "Printing Apple Support User Guides :
I am finding it impossible to use the Apple Support User Guides for things like Apple Shortcuts.
I've tried to find a possible item to use with the Apple Books App, but there isn't anything."
Try opening Apple Books App > Click on Book Store
Enter "Apple User Guides" in the search bar to view downloadable copies of many User Guides.
NB: Uh oh! I didn't see a Shortcuts User Guide when I looked - but then I use a Mac ... maybe you'll see it on iPad.
As you know, it is online ... Shortcuts User Guide - Apple Support
Apple's own User Guides are free, and so the "GET" button in shown to click on, rather than a price.
Take care, as there are various versions of some User Guides, to suit the different OS versions in use.
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Re: I don't understand why printing is available for more than one page at a time.
Does anyone have any answer to this baffling question?
Seems to me that Apple updates the User Guides frequently.
Therefore downloaded and printed copies will, quite soon, be outdated by newer versions.
The online version is generally up-to-date with the newest software in use.
All the best ! :-)