Hi,
thanks - the default runway length in the CRJ is set to 4500ft … the longest runway at SBRJ is 02R/20L with 4341 ft and therefore the CRJ suppress this airport. This is not a navdata issue because as I wrote before, SBRJ is included (also in the CRJ database)
… but the CRJ doesn´t accept icao codes with less the runway minimum length, as here in this example SBRJ. But you can reduce this limits somewhere in the CRJ FMS and than you can use SBRJ as normal - please look into the documentation of the CRJ or ask in their forum. As soon you have set a lower runway length limit, you will see that you can enter this icao code.
Hope that helps,
Richard