In your opinion, are worker cooperatives operating in a market economy socialist?
That’s not really how it works. The fundamental question is: is the https://en.prolewiki.org/wiki/State capitalist, meaning a dictatorship of the bourgeoisie, or is it socialist, meaning a dictatorship of the proletariat? While you can have a worker coop in a capitalist state, you’d still fundamentally be under the boot of the capitalist class that controls the state at the expense of the working class.
And do you consider any countries today socialist?