Tried it with the iPhone XS Max and iPhone X, and I tried it with several USB-C chargers, including the official Apple 18W USB-C charger that came with my iPad Pro. I didn’t get the double-ding when plugging in the iPhone, and I used an app to confirm the amperage while charging, which gave me 600-800 mA, compared to 1400 mA that I got with …
https://www.amazon.com/Apple-MKQ42AM-A-Lightning-USB-C/dp/B01DPSJQRG