Can you reference a resource created with for_each using a Splat (*) expression?

Referencing a resource created with for_each using a Splat (*) expression is not possible, as Splat expressions are specifically designed to work with resources that are created using the count parameter, not for_each.

When resources are defined with count, a Splat expression can help in gathering attributes from the instances of the resource by applying a wildcard convention (like resource_type.*). However, in the case of resources created using for_each, the resources are indexed using a unique key for each instance, and the Splat expression would not work since there's no direct numerical indexing as there is with count. Instead, you would need to refer to instances directly by their keys or apply specific access on the resources.

Understanding this distinction is key to properly managing references in Terraform configurations. It highlights the differences in how Terraform organizes resources and how their attributes can be accessed based on their creation method.