Canon USA now has the Canon EOS RP User's Manual available for download.
Preorders
Canon EOS RP – B&H | Adorama | Amazon US | Henry's | Wex
Canon EOS RP + EF 24-105 IS STM – B&H | Adorama
Canon EOS RP + RF 24-105 IS USM – B&H | Adorama | Amazon US | Henry's | Wex