What is this secret channel governments use to reach Facebook? And why only some governments can do it? Germans have won dozens of court cases against Facebook,

What is this secret channel governments use to reach Facebook? And why only some governments can do it? Germans have won dozens of court cases against Facebook, for example in election meddling, while in smaller countries there simply is no legal entity called "Facebook" you could sue in local courts. I just wish Germans would win one case in European Union election meddling, then we would have EU-wide legal precedence.