MetricKit for NetworkExtension

Hi Team,

I want to track fundamental metrics for the packetTunnelProvider and subscribe the MXMetricManager in packetTunnel but it did not call the didReceiveMetricPayloads even after using Simulate MetricKit payload.

I can subscribe to the container app but In my case, it is not guaranteed that the host app is launched timely or at least once a day.

Does the container app itself invoke in the background to collect the app and network extension Metrics in that case?

Please suggest the way, how we can collect the metrics for network extension?