The charging situation is really weird, I myself tested some chargers, all PPS supported(without PPS you stuck at 18W), at the right phone stats to trigger 40w+ charging (phone below 35 degrees Celsius, battery level below 20%, screen off), and with a physical charging meter(Kamera VA-3050C) connected to the type C-C cord(Lindy 5A supported).
Some worked, example like the Xiaomi 67w charger(18V-2.XA=40W+), but the Anker prime 737 65W stuck at 27W+(9V-3A=27W), elecom 65W(pps 45w) charger stuck at 27(same as the Anker 737)…
I also looked around the web and found out the Anker prime brick does support 3.3V~11V-5A through testing, so I assume the problem is with the phone
I hope they can look into this problem