How to apply MULTIPLE Kubernetes manifests using Terraform?

manifests.tf

# Install kubectl provider
terraform {
  required_version = ">= 0.13"

  required_providers {
    kubectl = {
      source  = "gavinbunney/kubectl"
      version = ">= 1.14.0"
    }
  }
}

# Configure kubectl provider
provider "kubectl" {
  config_path = "~/.kube/config"
}

# Load ALL manifest documents
data "kubectl_path_documents" "manifests" {
  pattern = "./manifests/*.yaml"
}

# Apply ALL manifests
resource "kubectl_manifest" "prometheus_operator" {
  for_each  = toset(data.kubectl_path_documents.manifests.documents)
  yaml_body = each.value
}