You did not make clear which Heltec LoRa dev board exactly you are referring to.
What is clear though is that this is another attempt at trying to make some kind of SCPF which are not supported so I changed the title.
To build a LoRaWAN gateway you need special hardware. A Heltec ESP32 LoRa board does not have that hardware. It only has a LoRa radio suitable for acting as LoRaWAN end device (aka node).
Us it as LoRaWAN node. See: Big ESP32 + SX127x topic part 3