The AWS Cloud https://aws.amazon.com/about-aws/global-infrastructure/regions_az/ and is continuously adding new locations. When a new region launches, a core set of services are included with additional services launching within 12 months of a new region launch.
The https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/registry.html contains information about the AWS and third-party extensions, such as resources, modules, and hooks, that are available for use in your AWS account.
This output lists all of the Amazon provided CloudFormation resource types that are available within the us-east-2 region, specifically three https://aws.amazon.com/private-ca/?nc=sn&loc=0 resource types.
This region launched with core services available, and AWS service teams are hard at work bringing additional services and features to the region.