I need nested for_each loop to add multiple disk within resource block for VM's

I am working on use case to provision vm with for_each loop iteration in vsphere target.
i would like to launch VM with disk define corresponding to vm name in variables.tf

please check the below code

variable "demo" {
 type = map(object({
     ip_address = string
     hostname = string
     subnet = string
     vcpu   = string
     ram    = string
     disks   = list(map(any))
  }))
 default = { 
  demo1 = { 
        ip_address =  "1111.1111.1111.1111"
        hostname   =  "test1"
        subnet     =  "subnet1"
        vcpu       =  "4"
        ram        =  "8"
        disks =  [
         {
              name = "disk0" 
              size =  100
              unit_number = 0
         },
         {
              name = "disk1" 
              size =  300
              unit_number = 1
         }
       ]
  },
  demo2 = { 
        ip_address =  "222.222.222.222"
        hostname   =  "test2"
        subnet     =  "subnet2"
        vcpu       =  "4"
        ram        =  "8"
        disks =  [
         {
              name = "disk0" 
              size =  100
              unit_number = 0
         },
         {
              name = "disk1" 
              size =  300
              unit_number = 1
         }
       ]
  },
  demo3 = { 
        ip_address =  "333.333.333.333"
        hostname   =  "test3"
        subnet     =  "subnet3"
        vcpu       =  "4"
        ram        =  "8"
        disks =  [
         {
              name = "disk0" 
              size =  100
              unit_number = 0
         },
         {
              name = "disk1" 
              size =  600
              unit_number = 1
         }
       ]
  }
  }// close default
}// close main

############# locals.tf ################

locals {
  # flatten ensures that this local value is a flat list of objects, rather
  # than a list of lists of objects.
  env_provisioning = flatten([
    for vm_name, vm_resources in var.demo : [
      for disk in vm_resources.disks : {
        vm_name = vm_name
        ip_address = vm_resources.ip_address
        hostname   =  vm_resources.hostname
        subnet     =  vm_resources.subnet
        vcpu       =  vm_resources.vcpu
        ram        =  vm_resources.ram
        name       =  disk.name
        size       =  disk.size
        unit_number = disk.unit_number 
        //cidr_block  = subnet.cidr_block
      }
    ]
  ])
}

#################### vm.tf ##############

resource "vsphere_virtual_machine" "this" {
 for_each = {
  for disk in local.env_provisioning: "${disk.vm_name}.${disk.name}" => disk }
  name             = each.value.hostname
  resource_pool_id = data.vsphere_resource_pool.default.id
  datastore_id     = data.vsphere_datastore.datastore.id
  folder           = data.vsphere_folder.folder.path
  firmware         = "efi"
  num_cpus         = each.value.vcpu
  memory           = each.value.ram
  guest_id         = data.vsphere_virtual_machine.template.guest_id
  network_interface {
    network_id = (each.value.subnet == var.backend_subnet ? data.vsphere_network.backend-subnet1.id : data.vsphere_network.frontend-subnet0.id)
  }
  disk {
      label = each.value.name
      size = each.value.size
      unit_number = each.value.unit_number
  }
  clone {
    template_uuid = data.vsphere_virtual_machine.template.id

    customize {
      linux_options {
          host_name = each.value.hostname
          domain    = var.internal_domain
      }
      network_interface {
        ipv4_address = (each.value.ip_address)
        ipv4_netmask = (each.value.subnet == var.backend_subnet.name ? var.backend_subnet.cidr : var.frontend_subnet.cidr)
      }
      ipv4_gateway = (each.value.subnet == var.backend_subnet.name ? var.backend_subnet.gateway : var.frontend_subnet.gateway)
      dns_server_list = var.dns
    }
  }
}

Expected Results:

after running above code its iterating only for one disk which disk0, its not adding disk1 which is mention in variables.tf for all vm’s
i want for every VM define in variables.tf number of corresponding disk should be also added

Can someone help here ?