Earlier quoted context omitted.
> PostNord is a private business owned by Sweden and Denmark. That would be a public business?
It's not publicly listed. It's private.
>>> its employees have the same right to strike as any other private sector employees.
A business owned by the state is part of the public sector, not the private sector. This isn't a question of whether shares of its stock are traded on a public exchange. Companies with publicly-listed stock are still private companies in this sense.