I'm looking for a way to enable the autofill for a password textfield in a login form
As a backup solution, I was thinking to save the password in the secure storage, and then, with the biometrics, recovering the same password when a new login is performing.
But this won't cover all the autofill password experiences from iOS 12. For example the password won't be saved across multiple devices.
Any tips?
Auto-Fill is not yet supported in flutter out of the box. There are two issues i know of which are tracking this issue (although android related). You might want to subscribe/vote on those:
I fear it won't be easy to trigger this functionality via a 3rd party plugin though.
As for your question regarding secure storage: If you are using the flutter secure storage plugin which uses the keychain on iOS, it should be synced across devices via iCloud.