Don’t get too excited. Apple added this feature a couple of years ago to the iPhone, but studies have shown it makes a negligible difference in battery life. Modern charging circuitry and software does a pretty good job of keeping batteries in good health already.

https://www.macrumors.com/2024/09/24/iphone-80-percent-charging-test/

Just use your battery and replace it after 4…6 years when it is not good enough anymore. This is a non-issue since 10 years because of better cell chemistry (not because of better charging circuits, they charge the same CCCV way).