Amazon Kinesis Data Firehose is now available in the AWS GovCloud (US-East) Region. Amazon Kinesis Data Firehose is the easiest way to load streaming data into data stores and analytics tools. It can capture, transform, and load streaming data into Amazon S3, Amazon Redshift, Amazon Elasticsearch Service, and Splunk, enabling near real-time analytics with existing business intelligence tools you are already using today.

from Recent Announcements https://aws.amazon.com/about-aws/whats-new/2019/06/amazon-kinesis-data-firehose-available-in-aws-govcloud-region/