ansible_host does not register ip_address/hosts under groups argument during first terraform apply, empty inventory

[ghost]

I am trying to build a dynamic inventory using the tfstate file and run ansible playbook once my vsphere virtual machine is up.
The issue is when I run terraform apply, the ansible playbook is not executed and the logs read => skipping: no hosts matched.

However, when I rerun the terraform apply, the ansible playbook is executed successfully

I tried adding a sleep resource between null_resource.inventory and null_resource.playbook, yet the inventory file did not register the hosts for the first time.

Versions used: ansible 2.16 and terraform 1.3.6

Code:
resource "ansible_host" "webservers" {
name = "vsphere_virtual_machine.vm.id
groups = [webservers]
variables = {
ansible_host = vsphere_virtual_machine.main.default_ip_address
ansible_user = user
ansible_ssh_private_key_file = private_key
}
}

resource "null_resource" "inventory" {
provisioner "local-exec" {
command = ansible-inventory -i inventory.yml --graph --vars
}
}

resource "null_resource" "playbook" {
provisioner "local-exec" {
command = ansible-playbook -i inventory.yml playbook.yml
}
depends_on = [null_resource.inventory]
}

inventory.yml
plugin: cloud.terraform.terraform_provider

playbook.yml

• name: Run Playbook
  hosts: webservers

inventory file when during first terraform apply
ansible-inventory - inventory.yml --graph --vars
@ALL
|--@Ungrouped

inventory file when during second terraform apply
ansible-inventory - inventory.yml --graph --vars
@ALL
|--@Ungrouped
|--@WebServers
| |--ip address