Terraform using depends_on with previous iteration of loop

I'm using a for_each to loop through the following variable:

networks = {
  network1 = {
    name = "NETWORK1"
  },
  network2 = {
    name = "NETWORK2"
  }
}

There is a dependency on the underlying API that a second network can only be created if the previous one has been created.

Therefore I wanted to use a depends_on in the below snippet:

resource "virtual_network" "network" {
  depends_on = []

  for_each = var.networks
 
  parameters {
    payload {
      name = each.value.name
    }
  }
}

How can I make the network creation dependent on the previous iteration of the for_each loop?