I found https://www.androidauthority.com/maximize-battery-life-882395/ but I don’t know if it applies to every device, or if I should charge my asus X00PD differently
Not a really good answer: I just stopped caring about it.
This is the best answer, modern Android just gets it right with no intervention.
Charge it whenever you need to, but heat is the battery’s biggest enemy. A slow charger is ideal since it generates less heat.
If your phone is plugged most of the time, you can consider setting a charge limit if you don’t typically use more than what limit is supported.
P6P here had it since day one. My battery is not in the best shape, but not terrible either.
I just charge when it’s needed and adaptive charging has done a pretty good job of keeping the battery healthy.
Overall though at the end of the day I’m not sure there’s too much we as the user have control over.