I've done some research but, at the time of writing, I cannot find any way of a React Native app integrating with the new iOS 11 password autofilling system.
Do we need to use entitlement certificates (as mentioned here: Password AutoFill for iOS App and https://willowtreeapps.com/ideas/password-autofill-in-ios-11)
The part I'm not sure is how that integrates with React Native?!