The Swedish Transport Agency is required by law to provide plates. If it cannot fulfil its duties because of a force majeur event then it would be expected to explore alternatives like allowing plates to be picked up at the factory, which is not forbidden by law. It might be forbidden by the contract with PostNord, but PostNord is undergoing a force majeure so it cannot object to it.

> If the Swedish government wanted to break the strike, it can--trivially. There is simply zero political will to do so.

That won't be breaking the strike if plates are allowed to be picked up. If the government does not want to follow Swedish law and their duties, then the courts should force it to do so.