Of all the rechargeable battery based devices I've used in the past 20 or so years, I've never ruined my batteries by not following the rule of "unplug it as soon as it reaches 100%" All of my smartphones since I had my first one in 2010 was always plugged in overnight. None of them had any issues with battery capacity issues or whatnot. Charging circuitry will cut off charging the battery when it reaches capacity. It then trickle charges it over time to keep it topped off. Unless something happens to this circuitry or the smarts driving it, the battery will not be in a condition where it catastrophically fails.
Also with regards to laptops, it becomes even less practical to follow the practice of "disconnect it from power when it's done charging". For one, laptop batteries aren't easily removable these days. For another, many higher powered laptops require the adapter to work to its fullest. My laptop under full load can consume about 100-120W of power. Its battery cannot safely discharge that much power. So what's the point in having a gaming laptop if I can't use it to its fullest because I have to disconnect it from mains power whenever the battery is charged?
Now there is a kernel of truth to avoid keeping rechargeable batteries at 100% all the time. Nickel based batteries would lose capacity much faster if you tried to keep it at 100% all the time due to the so-called memory effect. Lithium based batteries don't have this problem or it's so insignificant that the natural degradation is faster than the memory effect. However, if you plan on keeping a lithium battery in long-term storage, you're not supposed to keep it at 100%, but more at around 50%. And yes, there are now options in devices to not fully charge the battery, because not using the battery would probably count as being "in storage."
So don't worry about overcharging the thing or whatever. If there really was some sort of special care needed for the battery, the manual should've spelled this out very clearly.
If anything, the one thing you should never expose batteries to is high heat. That's what kills batteries faster.