Automatic Store Password and Security Code AutoFill in IOS not working properly

I have reffed this link https://agostini.tech/2019/02/25/generating-strong-passwords-with-autofill/
for storing password and autofilling in React Native which is for iOS platform but that is not working for automatic store password this is working for manual store. this is working for auto fill password which is already saved manually but not showing the bottom sheet dialogue for use my own password.