There is a lot of opinions on how best to charge a phone.
Just Google to subject and you'll see on tech blog pages and forums like this one.
Some don't let their phone's reach 100% full charge.
I do not let me phone drop below 15% but I've had no issues over the many years I've been using phone's from letting it reach 100% or have had any issues charging overnight in any way.
The phone and Samsung Charares are clever enough to know when 100% has been reached and then it reverts to trickle charging.
Personally I turn my phone Off overnight and charge it via normal charging i.e I don't use fast charging unless I need a quick boost of power which is rare.
This is my own experience and personal opinion.
Daily Driver > Samsung Galaxy s²² Ultra 256Gb in Phantom Black.
The advice I offer is my own and does not represent Samsung’s position.
I'm here to help.