iphone 14 battery draining overnight

Had Apple Support through chat do a diagnostic on phone; suggested making a Genius Bar appointment which I did. Another diagnostic was run along with a reset on phone. This will fix any Software problem. If it occurs again (very irregularly) then this points to a hardware problem. Posting this for anyone else out there who has experienced this problem. It was determined not to be an app draining the battery.

Would having maps running in background always explain why the battery drained overnight on 2 separate nights? I would think there would be a more consistent battery drain overnight than a surprise dead battery.