Large and Dense Zigbee Network

[FVDemtroys]

Hi,

We currently work with large Zigbee networks (~800 nodes, mostly routers), we are interested in using your ESP32-C6 chip since it can not only support Zigbee but also WiFi.

The routers send data periodically to our coordinator/concentrator module (unicasts).
The coordinator sends data periodically to our routers (multicasts).

Our current networks are very stable and have little to no issues. I could not find any cases of the ESP32 devices being used in large and dense networks.
Before we can consider the ESP32 devices for our Zigbee networks, we need some confirmation that the ESP stack is stable enough for our use case. This question is directed to the Espressif tech team.

A second question I have is concerning custom Zigbee packets. Does the API allow us to customize the packets being sent? I would like to simply specify the address of the destination node and insert the HEX payload to be sent. Is there a way to achieve this?
In other words, I do not want to use the standard Zigbee clusters.

Thanks,
FV