Make AWS Route53 Record depend on output of previous GCP resource creation

Terraform
1

Like the title says, I need to create or update an AWS Route53 record with the (Ephemeral) IP address from a GCP Resource created in a previous step. Currently it looks like this:

data "google_compute_image" "standard_shielded_base" {
  family  = "ubuntu-1804-lts"
  project = "gce-uefi-images"
}

resource "google_compute_instance" "example" {
  name         = var.gcp_machine_name
  machine_type = "n1-standard-2"
  zone         = var.gcp_zone

  tags = ["custom-tag"]
  allow_stopping_for_update = true

  hostname = "${var.gcp_machine_name}.example.com"

  boot_disk {
    initialize_params {
      image = data.google_compute_image.standard_shielded_base.self_link
      size = 40
      type = "pd-ssd"
    }
  }
  network_interface {
    network = var.gcp_vpc_network

    access_config {
      # Ephemeral IP
    }
  }
}

resource "aws_route53_record" "example" {
  zone_id = var.aws_hosted_zone_id
  name    = "${var.gcp_machine_name}.example.com"
  type    = "A"
  ttl     = "300"
  records = [tostring(google_compute_instance.example.network_interface.0.access_config.0.nat_ip)]
}

but the issue is that the record isn’t getting updated if the IP address changes. Is there a better syntax for this? I tried using “output” but my understanding is that these aren’t available until a plan is fully applied.