This is a context-sensitive widget depending on whether the toggle in the dashboard’s upper right is set to Video or Phone. In Video mode, it is called Endpoints and ISPs. In Phone mode, it is called Upstream and Downstream. In both cases, it shows quality and volume breakdowns of all streams or calls by endpoint and ISP.
The Endpoint tab shows endpoint devices used during meetings and phone calls for the selected timeframe. When in Phone mode, it shows the average MOS for upstream & downstream call legs for each endpoint: