Amazon EMR 7.8.0 - Flink release notes - Amazon EMR
Services or capabilities described in Amazon Web Services documentation might vary by Region. To see the differences applicable to the China Regions, see Getting Started with Amazon Web Services in China (PDF).

Amazon EMR 7.8.0 - Flink release notes

Configuration – EMR Flink works out of the box with S3A in all Amazon regions/partitions.