Identify Z-Wave device used on old EU C-3 hub

I have an old EU C-3, with a separate Z-Stick Gen5 for the EU Z-Wave frequencies that works transparently. Is there anywhere in logs/UI can see which Z-Wave being used - the "US" one in the combined Zigbee/Z-Wave stick or the separate "EU" one?

Context: A few days ago, I lost all my Z-Wave devices, and I have been unable to restore them. I tried to pair a random new device but can't detect it. So, I have a feeling that the "EU stick" isn't used anymore. I have plugged it into a PC where it detects correctly, so at least it isn't totally dead.