Xiaomi's current highest rate of commercial-grade wireless charging is found in the Mi 10 series. It can power a phone at 30 watts (W). However, the OEM has also just demonstrated its next generation, a 40W system, that can charge a phone in as little as 40 minutes.
https://www.notebookcheck.net/Xiaomi-teases-its-new-40W-wireless-charging-standard.455233.0.html