I have tried, and succeeded, in getting different hardware and software platforms to communicate via LoRa, though not with your particular hardware\software.
Your starting point should be to prove that the boards you have are actually transmitting LoRa and are capable of receiving LoRa.
This is relatively straight forward when you have two sets of each bit of hardware.
And there is the problem, two different bits of hardware either of which might not be working and no known working code for either.