Interesting, thanks for sharing! I'm interested in creating some form of live video/image system, thanks for this!
The latest generation of chips (AFAIR not yet released) integrated a mode that allows them to receive on all LoRa speed grades in parallel. Bit like the existing LoRaWAN basestation ICs.
I remember reading a datasheet that one (already released chip) is also able to work on 144-146MHz. But that's not what standard Asia (ESP32+LoRa modules) offer. TTGO has AFAIR recently released a super new board that allows this band.