I can only imagine small adjacent societies that choose to be anarchist as a preference but use the hierarchical power structures (normal society) as the backbones of their operations. Meaning, these small societies would look for real doctors in case someone got cancer or a neurological disease. They probably use the electricity provided by private companies in coordination with the government. Same goes for internet infrastructure. Roads. Clean water. Medicine. Metallic tools. Money (like bills and coins). Urban planning.

Even stuff like security. They know they are safe in their land be use nobody will try to take it away from them, the government is taking care of that. They can call the police if someone in their community is murdered.

It's like an escape society, but not like a functioning globalized society. I'm not sure an anarchist society could create complex structures itself, so if there's any, I'd love to learn.