It isn't uniform by any means but the US runs on a physically independent cloud, often in their own facilities, designed by the big cloud companies. When using the public cloud for unclassified work (e.g. working with outside vendors), the data is only allowed to reside in specific data centers that have been vetted by the government, not all US regions have the same authorization. For example, government data in an S3 bucket in the public cloud may only be accessed and processed within the same region, which can be annoying if your infrastructure is elsewhere.
The US is far ahead of most countries when it comes to government use of the cloud. Other developed countries often learn how to do it from the US but are less comfortable with the technical requirements, which slows down adoption.
The US is far ahead of most countries when it comes to government use of the cloud. Other developed countries often learn how to do it from the US but are less comfortable with the technical requirements, which slows down adoption.