Call to Get-CloudEnvironment returns the Cloud information from https://login.micosoftonline.com//v2.0/.well-known/openid-configuration.
Commercial tenant
"tenant_region_scope" == NA, "tenant_region_sub_scope" == NULL
GCC Tenant returns "tenant_region_scope" == NA, "tenant_region_sub_scope" == GCC
USGov tenant returns "tenant_region_scope" == USGov, "tenant_region_sub_scope" == NULL
So additional logic is needed to determine if the scope is more than just a subscope for USGov.