I deployed a Service Fabric Cluster running with a single application and 3 Node Types of 5 machines, each with its own placement constraint.
I need to add other 2 N
Another option is to use New-AzureRmResourceGroupDeployment with an updated ARM template that includes all the resources for your new node types, as well as the new node types.
What's nice about using the PS command is that it takes care of any manual work that you may need to do for creating and associating resources to the new node types.