Are there any plans to add this in?
The CRJs currently show up in MSFS 2024 as a MSFS 2020 aircraft, similar to Fenix A320 which supports GSX Pro seated passengers in MSFS 2024.
Right now, the installer only supports airplanes installed in 2024, but using the 2020 structure-like for example, the Fenix A320, not sure the Aerosoft CRJs are like that too.