For the most part, the RJ should use standard control assignments for any controls that are common between aircraft (Parking brake, flaps, lights, etc.). We do, however, use some non-standard control assignments for controls that are specific to the RJ. Those are listed at the very end of the RJ Operations Manual: https://support.justflight.com/en/support/solutions/articles/17000142841-rj-professional-msfs-manuals
Mark - Just Flight