How to define the cloud role name from a PowerShell script?

Question

Hello!
I am using Application Insights to log events and exceptions that occur in a PowerShell script.
I need to define the cloud role name so a new node would be added in the application map..
I tried this but it doesn't work:

$appInsights.InstrumentationKey = $ConfigEnvironement.Settings.AppInsightsInstrumentationKey;
$appInsights.Context.Cloud.RoleInstance = "";
$appInsights.Context.Cloud.RoleName = "roleName";

There is no new node in the application map. Do I need to add a telemetry initializer like below?:

$appInsights.TelemetryConfiguration.TelemetryInitializers.Add(What to add here?);

I can't find any source of information regarding the cloud role name in PowerShell...

Thanks for your help!