Battery of my iPhone dead in approximately 6-7 hours

Hi,

Faced this situation first time.

As I remember at 10PM I had 100% charge. I left the phone and went to bed at 11 PM. I woke up morning at 6 and when I checked my iPhone was switched off and when pressed the power button it left a message on screen something like iPhone is findable .

Battery health is at 97%.

I took some screen shots after turning it on.

Should I take it to the service centre and get it checked? What might have caused this any idea? Between I use apple 20W adapter with apple mag safe charger.

Thank you.