Get Info on Function Apps
Commands to find info on vnet usage of function apps:
Get the function apps:
$functionApps = Get-AzFunctionApp -ResourceGroupName $resourceGroupName -Name $functionAppName
go through each app to display the vnet and subnet it is attached to using the siteconfig info:
foreach($app in $functionApps){write-host "$($app.siteconfig.vnetname) $($app.name)"}