Are these the same sockets? - https://amzn.to/3hu6Rn3The gpio pins are used to re-flash the cc_2531 board only. This would probably be the most frightening bit of the whole project.
Node-Red on your Cerbo communicates with the Smart Socket over zigbee WiFi via the cc_2531. I was surprised that the the Venus OS had the drivers for the cc_2531 but it works.
This is the Smart Socket I bought Ikea Smart Socket. The ones in your link are zigbee so may work but I have no experience with them.Are these the same sockets? - https://amzn.to/3hu6Rn3
PS. Possible aside. I have 2 (maybe 3?) different types of Smart Sockets and I found if I have one of them (maybe the Tapo brand I think?), then the other one cannot be accessed. This is with Alexa control, but there could be a conflict of drivers between socket types using other interfaces?
I don't know if it is relevant to using the Node Red/Venus stuff if expanding the setup but just mentioning it in case unexpected quirks arise.