Huawei is now rumored to be integrating a new form of device security, Voice Unlock, into its upcoming flagship, the Mate 20 Pro. This device may also have a 6.9-inch screen, as much as 6GB in RAM and an extra-large battery
https://www.notebookcheck.net/Huawei-Mate-20-Pro-may-come-with-voice-based-unlocking.336464.0.html
Sounds like more of a gimmick than Face ID, unless the phone's voice recognition is mature enough for voice input to be the main control method.