将地图展平为terraform中的列表？

variable "regions" {
  type = map(object({
    ami_id   = string
    instance_type = string
  }))
  default = {
    us-east-1 = {
      ami_id        = "ami-0c55b159cbfafe1f0"
      instance_type = "t2.micro"
    }
    us-west-2 = {
      ami_id        = "ami-0a54c984b9f908c81"
      instance_type = "t2.micro"
    }
  }
}

locals {
  flattened_regions = flatten([
    for k, v in var.regions : [
      {
        region      = k
        ami_id      = v.ami_id
        instance_type = v.instance_type
      }
    ]
  ])
}

output "flattened_regions" {
  value = local.flattened_regions
}

locals {
  flattened_regions = flatten([
    for k, v in var.regions : [
      {
        region      = k
        ami_id      = try(v.ami_id, "")
        instance_type = try(v.instance_type, "")
      }
    ]
  ])
}