Upon loading that page, it always says "No Data". Clicking on 60 Hours suddenly shows all previous data, then clicking on 20 hours right after (the default) also shows the data.
Tried it in Safari / Brave (Chrome) on Mac.
Let me guess your flowd_aggregate (Insight Aggregator) services is running on the dashboard. Yet when you click on Reporting -> Insight you get no data available? I too have this issue. Running 22.7_4 as well.
Sorry I was assuming you where having issues with flowd. The Reporting -> Health Packets show no data but simply click on any interface in the pulldown and data will appear. I noticed this bug as well on upgrading. Still waiting to see flowd resolved.