For anyone who is interested, I found a solution... I think these are clones of Etekcity/Energenie plugs. I used Energenie 5-gang with trial and error to find the house code.

Hi everyone I'm trying to get domoticz to work with some cheap 433Mhz smart plugsI bought from amazon ( https://www.amazon.co.uk/DEWENWILS-Control-Wireless-Programmable-Sockets/dp/B07NJ2XHZC ). Note: the plugs have a small sticker on them that reads "0307-1", "0307-2" AND "0307-3" (there are three ...