The Soviet Union was anti-trade union, and pro-Soviet, ie worker councils. The Soviet Union had numerous problems, especially with beaurocracy, but fundamentally it was a Worker state, owned and run by the Soviets, and thus can be considered Socialist (regardless of my personal issues with it).
There are several attempts at replicating some form of Worker Democracy in Capitalist countries, but ultimately short of ownership none of this functionally makes a massive difference. Definitely a step in the right direction, but without worker ownership it is more to appease workers and uphold Capitalism, than actually giving workers control.
Don’t misunderstand this comment to say that codetermination is bad, it’s good, just not as good as it could be.