The European Union created their Combined Charging System (CCS) standard and has been enforcing it since around 2014. I think Tesla's charging infrastructure in Europe has been forced to comply with that standard since it's inception as a precondition to apply for subsidies.

The US followed suite and has also forced support for CCS when applying for subsidy programs to grow Tesla's charging network.

https://qz.com/the-white-house-is-trying-to-persuade-tesla-t...