There is a lot of ambiguity in determining who historically is socialist and who is not. Socialism just means government controls the means of production. Basically, every country has some element of that, so are we all socialists? If it's the government controlling all the means of production, then nobody is socialist. Neither ends of that spectrum are useful for conversation, so then we must subjectively determine who is socialist enough in our eyes to count as a socialist.
Look at the US...education is not only a huge industry, but it's one of the most important areas of life. Something like 95% of K-12 education is provided by the government and the government tries to regulate the other 5%. Government is the means of production. Is that enough to qualify us as socialist? Why or why not?
Government provides basically all the means of production in law enforcement and military defense.
We accept this stuff as default and never stop to think about what label to apply to it.