The Huawei Mate X's successor, thought to have the code-name of "Tahiti", may have been certified as a phone in China. The leak in question also shows that the device in question can charge at a top rate of 65 watts (W). This technology may also feature in the P40 series.
https://www.notebookcheck.net/The-2nd-gen-Huawei-Mate-X-may-support-65W-charging.448847.0.html