Passkey is a new login protocol that is believed to be more secure because it uses the user's biometric data as identity verification for login. It is also a password-free login method. Recently, WeChat has integrated this login method on their iOS app.
According to WeChat for iPhone users to use this feature, the device should be running at least iOS 16, iCloud Keychain feature enabled and Apple ID using two-factor authentication. Then in the application search for Me and press Settings, select Account & Security, and press Passkey. After completion, every time you log in to the WeChat application you can use Face ID or passkey data that is already available in the device.
Passkey is a login method that receives FIDO recognition and is used by many manufacturers such as Google, Apple, Microsoft and many others. Passkey data can be used cross-device and can also be imported or exported.