Ok just venting here... Last couple of days, my HE has been failing at so many actions..
Moments ago latest experience.. kitchen lights are set to be on while motion is detected on any of 3 motion sensors. My wife asked "did I turn the lights off" so I quickly checked my motion dashboard and see 2 of the sensors have active motion.
Yesterday my notifications were ignoring the fact I pulled my clothes from dryer but continued to send reminders, but ONLY on my phone and not by voice on the speakers.
It only tracks it by the event history, so you could filter that to see the recent history.
Otherwise for charting I think the app is Simple Charts, also webCore can do charts. Most extreme option is exporting the data to a database and using Grafana (which can all be cloud hosted on free plans I think).