FYI, the same Zigbee Router firmware has now also been tested with ESPHome on a ZB-GW03 eWeLink Ethernet Zigbee Gateway which is based on ESP32 instead but have the same “SM-011 V1.0” EFR32MG21 Zigbee module by CoolKit that ITead uses in their Sonoff ZBBridge Zigbee Bridge:
https://github.com/syssi/esphome-zb-gw03/blob/main/docs/router.md
https://github.com/syssi/esphome-zb-gw03/issues/12
ZB-GW03 eWeLink Ethernet Zigbee Gateway ZB-GW03 v1.0 / V1.2 is based on ESP32 and have RJ-45 Ethernet port, it is also sold rebranded under many names, including EACHEN and SmartWise brands:
ESPHome can be installed on both the ESP32 based ZB-GW03 and the ESP8266/ESP8285 based ZBBridge Zigbee Bridge: