Not supported, but can use 20w fast charging head and charging cable, Apple 11 official data show that support 18W fast charging, the actual charging power peak can reach 20W. iphone11 up to support about 22w fast charge, you can buy a 30w pd fast charge head, with mfi certified pd charging line, pd agreement will automatically adapt the current and voltage, rest assured on the line.
It can be used, but the iPhone 11 only supports 18W fast charge, and the fast charge standard used is PD fast charge. According to the website, the iPhone 11 can be fully charged to 50% in half an hour.