In the app: Battery→High voltage
From the guide: What some readings mean
Insulation (isolation) resistance: the high-voltage system's isolation from the car body. Very large values are normal. A value that falls sharply, or an isolation fault code, is a safety issue for a qualified shop; the owner should not open anything.
From the guide: Battery tab
High voltage: pack voltage, pack current, power, isolation resistance. Also the VIN and charging totals.