At least on my Pixel 7, it doesn't actually charge it all the way if I plug it in at night. It will charge until 80%, then very slowly over the course of the night until my first alarm (of many, I'm a heavy sleeper lol) it'll get itself to 100%.

Phones these days take good care of their own batteries, 100% doesn't actually mean 100%, same with 0% since both are extremely bad for Li-ion batteries.