No, both 1090-fa need to be 30005. Airpsy doesn’t need to output on 30005.
Take a look at this too:
FlightAware Integration
The easiest way to integrate Airspy into an existing FlightAware PiAware system is to feed dump1090 through its “MLAT result” port.
mkdir airspy cd airspy wget https://airspy.com/downloads/airspy_adsb-linux-arm.tgz tar xzf airspy_adsb-linux-arm.tgz sudo ./airspy_adsb -c localhost:30104:beast -c sdrsharp.com:47806:avr -p &