What is the Autofill function?
Go to “Settings” -> “System” -> “Languages & input” -> “Autofill service”.
For the most commonly used applications on user devices, the Autofill service will help users to log in quickly without having to fill out account names and passwords every time. For example, when a user uses a new device, the saved account name and password can be extracted from Chrome. After selection, the automatic filling function can be carried out locally, and will be applied to most of the applications you may be using.