Hi Peter,
Do you use our cable that comes with Reach M2? Can you please share the photo of the setup? I want to see how the LoRa radio is connected to the module.
I also did a brief test with Reach M2 and LoRa radio. When I connected them, the power LED on the modem was on, while the RX and TX LEDs were off. But the LoRa radio seemed connected in ReachView 3 and allowed receiving corrections.