My phone support (and came with) a 33W charger, I tested it and it properly charges at 11V 3A, very quick, I used it 2 or 3 times only in emergency because I had to go and 20 minutes charges to 70% or something.

Else? My phone is on my desk, connected to the computer, it charges slowly (5V 500mA?), when it reaches 80-85% I unplug it.

I WFH so it is never a problem, I keep my phone between 30 and 80% most of the time. After 2 years battery life is still impressive I think.