Best way to prolong MacBook Air M4's battery health?

I own a MacBook Air M4, which is almost only used as desktop computer with an external monitor and type-c hub plugged in with few accessories such as keyboard, mouse, headphone and external HDD.

I set Settings->Battery->Battery Health->Optimized Battery Charging is turned on.

Whenever I use the MAC, I turn on the wall switch where the original charger that came with MacBook Air M4 is connected and off it when I am not working.

I observed that battery charging shows on hold at 80% most of the time.

Is this the best way to prolong MacBook Air M4's battery health?