So the HA custom component may need fixes. Please correct me if I am wrong. In particular, the app says there’s no data between 12:30 and 14:30 (after updating) but HA says:
The graps look somewhat similar (I chose “show more detail” in the 2nd HA picture). I compared the app with HA again: 74 vs no data for the period 13:21:04 through 13:36:04 on Jan 21, 2023.
unfortunately it’s not possible due to Oura API not exposing any battery related info…only thing I found on their API docs is “low_battery_alert”: true"