Hello.
Do you know if there is any way to integrate ESP32-Gateway in NodeRED?
Greetings.
If any other ESP32 board had ever been integrated in NodeRED, then the chance that ESP32-Gateway can also be integrated. I've seen our boards succesfully used for MQTT check here:
https://github.com/OLIMEX/ESP32-POE/issues/6
Also maybe check ESPHome project, it can be used in similar way as NodeRED and I've seen more experience shared with ESPHome's MQTT and ESP32 chips.