CC2531 ZHA and installation / extension to the network

Hi

I want to use my unused cc2531 from Aliexpress.
I’m not sure if it working correctly.

Little Context :
At first I had a HA using Docker (HA Core?) , and plugging the device IN doesn’t did anything.

So I switch to something easier to manage (I could find how to give access to my usb dongle to Docker)

Now I’m running it in HA OS + the new 3.0 Sonoff
But I would like to extend my network with it or find something to do with it

So :
1- It should come preflashed but I can’t find a may to confirm it
2-Do I new to look for a “router” firmware ?

been looking for a few link but couldn’t find something reliable enough for me

Thank you

If you use the Sonoff Zigbee 3.0 Dongle Plus as a coordinator, you need to flash your CC2531 with router firmware to use it as a router.