Battery Health

Hi Community, i bought a iphone 13 last year (14 May 2022) , after using the device just like 10-12 days My battery health drop 1% & after 1 month 2% drop, i don’t play heavy games regularly, once a week i play pubg.

My battery also calibarate fine, cause my battery health drop without updating software, last i Update 16.4.1 stable , my battery health was 92% , after 4 days of use it goes 91, 92, 90, within 2 day, and yesterday it goes to 89%.

Can anyone help me, apple saying my battery aging normally, but i don’t think so, Within 11 months it Lost 12%