AWS Lambda makes it easy to build highly available serverless applications quickly. However, setting up resources in multiple regions makes it difficult to manage the applications since cross-region access is limited by design in AWS for security and performance reasons. Fortunately, AWS makes it easy to access resources across regions if you intend to do so.

In this example. I’ll show you how to invoke a Lambda in one region from a Lambda in another region.

Lambda that invokes the other Lambda: SourceLambda in Oregon (us-west-2)

Lambda that is invoked: TargetLambda in N.Virginia (us-east-1)

Read the full article here: https://thedeveloperspace.com/cross-region-lambda-invocation-in-aws/