Reticulum RNodes can be used to listen to a LoRa channel. It seems this is only for a specific frequency and set of paramaters (SF, BW, etc.).

A python program called loramon connects to the RNode and prints received packets.

After installing the RNode:

pipx install loramon

Run something like: loramon /dev/ttyACM0 –console –freq 869431300 –bw 250000 –sf 10 –cr 3