Thanks for reaching out and apologies for the late response.
I know how important monitoring your HVAC usage history via the Nest App is, especially when you're away from the device. Most likely, either your HVAC system went down or an intermittent Wi-Fi connection caused the problem of not publishing the history or usage.
We can give these steps a try:
Let me know how it goes.
Chiming in to see if you still need assistance with this. Hope the previous post helped. Let us know if you have additional questions, otherwise we’ll be locking the thread.
Due to inactivity, I'll go ahead and lock this thread in 24 hours. Feel free to start a new thread if you need assistance with your Nest Thermostat and we'd be glad to assist you further.