Dynamic block "Tags" for aws_lb resource

Terraform Providers AWS
1

HI

Im a new in Terraform, so mb do not understand everything

Right now im trying to set Tags for “aws_lb” resources using Dynamic blocks.
I have a main.tf where using module and sending pre-defined Tags list into the module

module "webserver_cluster" {
  source = "../../../../Modules/services/webserver-cluster"
  ...
  custom_tags = {
    Owner = "IEA"
    DeployedBy = "Terraform"
  }
}

In the module I use dynamic block to set the tags for “aws_autoscaling_group” and “aws_lb”:

resource "aws_autoscaling_group" "Ter_T1_ASG" {
...
  dynamic "tag" {
    for_each = var.custom_tags

    content {
      key = tag.key
      value = tag.value
      propagate_at_launch = true
    }
  }
}
...
resource "aws_lb" "Ter_ALB_T1" {
...
  dynamic "tag" {
    for_each = var.custom_tags

    content {
      key = tag.key
      value = tag.value
      propagate_at_launch = true
    }
}

Mb its important, the “custom_tags” is defined in variables.tf module as:

variable "custom_tags" {
  description = "Custom tags to set on"
  type = map(string)
  default = {}
}

While for “aws_autoscaling_group” resource the structure is OK, for “aws_lb” there is an error:

│ Error: Unsupported block type
│ 
│   on ../../../../Modules/services/webserver-cluster/main.tf line 121, in resource "aws_lb" "Ter_ALB_T1":
│  121:   dynamic "tag" {
│ 
│ Blocks of type "tag" are not expected here.

I do not understand why?