CXone Reporting API v2 real-time queue stats returning empty data set

I’m trying to pull real-time queue stats from CXone using the v2 Reporting API. I’ve set up the C# client and am hitting the /api/v2/analytics/queues/realtime endpoint with the correct date range and queue IDs. The authentication works fine, but the response body always comes back with an empty entities array. I’ve verified the queue IDs are correct and active. Is there a specific filter I need to add to the query parameters to get actual data? The request looks like this:

var response = await client.ReportingApi.GetQueuesRealtimeAsync(queueIds, null, null, null);

Any ideas?