Start at the beginning.
Make sure that each setup will communicate with basic send and receives examples to another board of the exact same type and library. If you do that you know the transmit and receive hardware is working.
Mixing standard Arduino libraries on the same hardware can cause issues, but seperate hardware, program environments and libraries, that could be tricky, even for those well experienced with LoRa.
If your starting setup does not work, where would you start to look for a problem .......