If the FlightSim Studio E175 is selected as the airframe variant, the incorrect aircraft type code “E175” is populated in the VATSIM flight plan window instead of the valid codes “E75S” or “E75L.”
Hi, these airframes are contributed and maintained by FlightSim Studio themselves. They are the same as listed here: SimBrief Profiles | FSS Documentation Hub
I recommend you report this to FlightSim Studio support, they should be able to easily edit the airframes from their end.
Best regards,