I assume you have the non-US R30. Does it have a menu option to enter a key?
The standard encryption options have always been available for the NXDN and dPMR modes with the US firmware as well.
It's a basic form of encryption that is not very secure. The code can easily be guessed from the pool of available scramble codes.
I think there are 32,768 or 65,536 keys available to chose from for NXDN. Not sure about dPMR mode.
I'm not certain it's really considered a form of encryption though.
I tried it with a Icom portable. I selected and set a code for one of the NXDN channels. The 8600 would not pass audio on that frequency but once I set the 8600 to the same privacy code, the 8600 received the portable just fine. I remember the 8600 displayed something different on its display when it encountered the NXDN signal that had the privacy code set but I don't recall what it said.
For another portable model I can't recall, the code needed on the 8600 was off by 1 from what was used in the unknown portables TX settings.