Azure Event Hub destination

I have got two questions:

1. Its written in documentation something like that:

In case of failed requests to your HTTP API destination, Experience Platform stores the failed requests and retries twice to send the requests to your endpoint.

https://experienceleague.adobe.com/en/docs/experience-platform/destinations/catalog/cloud-storage/azure-event-hubs#limits-retry-policy

What happens then with such an event? I know that is still in AEP but can we somehow download which specific event was not sent to destination?

2. How to monitor such a Dataflow? If its streaming then what time range would be included in such a manifest file?

https://experienceleague.adobe.com/en/docs/experience-platform/dataflows/api/monitor#monitor-flow-runs