Export Vwan Topology - all cidrs of underlying vnet connections

Export-VwanTopology.ps1

# You can run this script like so:
# . .\vwan-topology-export.ps1 -VirtualWanName vwan-platform-prd-weu-001 | select -Property Component, Name, Cidr, Parent, ParentType | ConvertTo-Csv | Set-Content output.csv

param(
    [Parameter(Mandatory=$true)]
    $VirtualWanName
)

$vwan = Get-AzVirtualWan -Name $VirtualWanName
$vwanresource = Get-AzResource -ResourceId $vwan.id
$split = $vwanresource.Properties.virtualHubs[0].Id.split("/")
$hub = Get-AzVirtualHub -resourcegroupname $split[4] -name $split[8]

New-Object -TypeName PSObject -Property @{
    Component = "Hub"
    Cidr = $hub.AddressPrefix
    Name = $VirtualWanName
}

$conn = $hub.VirtualNetworkConnections

$conn | ForEach-Object {
    $vnet = Get-AzResource -ResourceId $_.RemoteVirtualNetwork.Id
    $vnet.Properties.addressSpace.addressPrefixes | ForEach-Object { 
        New-Object -TypeName PSObject -Property @{
            Component = "Vnet"
            Name = $vnet.Name
            Cidr = $_
            Parent = $VirtualWanName
            ParentType = "Hub"
        }
    }
    $prop = $vnet.Properties.subnets
    $prop | ForEach-Object {
        New-Object -TypeName PSObject -Property @{
            Component = "Subnet"
            Name = $_.Name
            Parent = $vnet.Name
            ParentType = "Vnet"
            Cidr = $_.properties.addressPrefix
        }
    }
}