Canon Europe has made the manual for the Canon EOS R5 available for download.
You can grab it here.
Regarding the stock of the Canon EOS R5, I’m told they will be shipping on time in the USA at least. A second allocation maybe delayed.
Preorder the Canon EOS R5
Canon EOS R5 Body $3899
Canon EOS R5 w/24-105mm f/4L IS USM $4999