I'm using the .Net library for the GA4 admin API. When I request CustomMetrics the MeasurementUnit in the response is always null.

Am I missing something?

var service = new GoogleAnalyticsAdminService(...);    
var metricsList = service.Properties.CustomMetrics.List("properties/1234567890");
var metricsResponse = await metricsList.ExecuteAsync(cancellationToken);
foreach(var customMetric in metricsResponse.CustomMetrics) {
    Debug.WriteLine($"{customMetric.DisplayName}.MeasurementUnit={customMetric.MeasurementUnit ?? "(null)"}"); // Always null
}

I've also noticed that the patch method does not accept measurement_unit in the UpdateMask.