Not fast wireless charging like a 15 watt charger. On the Pixel 8 pro, it will tell you if its slow/fast charging when plugged in and wireless charging or wireless fast charging on the lock screen.
It does charge decently quickly, maybe a bit above 7.5 watts and 2-2.5 watts when bypass charging (charging the bank while wireless charging the phone)
7.5 isnt too bad, its fast enough to give me a charge while I am also using the phone. If left idle could maybe charge my phone 40-50% in 40 minutes.
Overall I am pretty happy with it, love their 20k watt bank for my steam deck. Just wish this one was a bit thinner.