Dedicated WAN link is not configured for Azure virtual WAN connectivity, this may lead to a lower level of infrastructural security.
The Virtual WAN type cannot be changed in the console UI once it is created. To change from a Basic to Standard WAN, follow the steps below to create a new resource.
In Azure Console -
In Terraform -
References:
https://learn.microsoft.com/en-us/azure/virtual-wan/
https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/virtual_wan#type