Terraform nested maps for_each

Terraform
1

I want to manage Cloudflare DNS zones and records by Terraform.
I have a lot of zones and records, so I design variable like this:

variable "domains" {
  type = map(any)
  default = {
    "test.domain.com" = {
      config = {
        "account" = "account_name"
      }
      records = {
        "record1"   = "www|A|127.0.0.1"
        "record2"   = "www|A|127.0.0.2" 
        "record3"   = "mail|MX|127.0.0.3" 
      }
    }
    "test2.domain.com" = {
      config = {
        "account" = "account_name"
      }
      records = {
        "record1"   = "www|A|10.0.0.1"
        "record2"   = "www|A|10.0.0.2" 
        "record3"   = "mail|MX|10.0.0.3" 
      }
    }
    "testN.domain.com" = {
      config = {
        "account" = "account_name"
      }
      records = {
        "record1"   = "www|A|192.0.0.1"
        "record2"   = "www|A|192.0.0.2" 
        "record3"   = "mail|MX|192.0.0.3" 
      }
    }
  }
}

So the main idea to pass all this data to the module using for_each.
For each domain create all records.

module "cloudflare" {
  source = "./cloudflare"

  for_each = var.domains

  domain_name = each.key

  name     = element(split("|", each.value.records), 0)
  type       = element(split("|", each.value.records), 1)
  content = element(split("|", each.value.records), 2)
}

Does someone faced with it?
Or maybe you can propose a workaround?
Thanks!