Battery Health

Hello, I’ve had my iPhone 13pro since Jan 2022. I’m not a heavy phone user bt I’m getting worried as my battery health dropped from 100 to 98, stayed there for a month, then 98 to 95 in less than a week. Is this normal or is my battery showing signs of dying fast. I keep my phone plugged in over night and also charge it in my car whenever I’m using navigation apps as they tend to drain the battery pretty quickly