Can we use "Corporate Trust Boundary" stencil for "subnet" component in Microsoft threat modelling tool?

Question

I am trying to do threat modelling on application hosted on Azure cloud. I am using Microsoft threat modelling tool 2018 to do threat modelling.

When i try to replicate "subnet" component in my threat model, there is no stencil specific to "subnet". Can i use "Corporate Trust Boundary" stencil in Microsoft TMT tool instead of "subnet" component that is present in my architecture?