There is, not sure what kind of information you are looking for though. But if you press the FIR name on the enroute chart a box called "Selected Navdata" will appear. You can select NAV or COM. Select NAV. There you will see the available Data Link units, press the desired one. You will now see information regarding weather CPDLC/ADS-C/FMC WPR is available or not. And you can also see the LOGON name.
I hope that helped a little bit
