[AWS::CloudFormation::Macro] - [Docs] - Cross Region lambdas not supported

[awsdiegorad]

Name of the resource

AWS::CloudFormation::Macro

Resource name

No response

Reference Link

https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/template-macros.html#template-macros-permissions

Details

The Lambda Function that is used for a Macro must be in the same region that the Macro is defined. You may create the Macro while pointing to a lambda function hosted on a different region, however all attempts to execute the Macro will fail with a "Failed to execute" error.

This is undocumented in the Macro and AWS::CloudFormation::Macro documentations.

Here is a stack overflow page that states this behavior.