https://en.wikipedia.org/wiki/Mains_electricity_by_country
Even though the prevalence and availability of EV Charging stations is a general issue across countries, having 220V AC makes the current state more bearable especially for residential charging use cases. For many in the US, adding a new 220V circuit, or having the option to add one, ends up being a cost-driven obstacle for adoption.
Electrification in China has happened across all modalities of motor-vehicles, where all the previously hyper-prevalent gas-powered motor scooters of yesterday are also EVs.