Changing S3 Bucket Region of Aws Amplify

Please refer to this article.

https://aws.amazon.com/blogs/mobile/use-an-existing-s3-bucket-for-your-amplify-project/

You cannot change the region associated with an s3 bucket. You have to delete the old bucket and then re-create it in the new region.

Please note: It usually takes around 24 hours for the bucket name to be available again for re-use. Most of the times its less. During that time, you might receive error like "Bucket already exists". Also, once you delete the bucket, it's name becomes globally available to all AWS accounts, so anyone can take your bucket name if you don't create it first.