iPhone Battery health issue..!

Just after 2 months of purchase (June 15) my 15 pro max battery health is down by 1%.

Is this normal? (I Just switched from an android).

Used only original charger and cables.

Followed 80% rule as well.

What could possibly went wrong here??

Should I contact Apple care?

Just after 2 months of purchase (June 15) my 15 pro max battery health is down by 1%.

Is this normal? (I Just switched from an android).

Used only original charger and cables.

Followed 80% rule as well.

What could possibly went wrong here??

Should I contact Apple care?