Same rules as in Norway then. The weight of the Cybertruck will be from 2267 to 2950kg. At least with the last config, it will be a stretch if people want to use it for what people normally use trucks for.
Also, there might be some issues with how the front is designed:
Tesla Cybertruck Not Street-Legal In EU
Anyhow, Tesla has a history of getting around issues like these
But there is no doubt that many people have ordered several to have the chance to choose when they know more.
Do you expect many European Cybertruck owners to have the need for carrying more than 550 kg of weight? (Note: I’m not a truck owner)