Go to your Energy app in the car touchscreen, then click on "Park" at the top. It should then list sources of power loss. My 2023 MS is losing 1 mile/hour while parked/asleep with sentry mode off/cabin overtemp protection off. I'm not sure if that's normal, but my vehicle is making a constant hum coming from the frunk near the passenger side. My Energy app reports most of my drain is due to "vehicle standby" which is not very insightful.