Autofill passkey instead of login/password on iOS app

I have an app where I can login via passkey or login/password. The issue is when I'm tapping the login field the keychain offers me to use password instead of passkey. The issue will dissappear if I remove the password from the Password app and just leave the passkey as a login option. My login page is a SFSafariController which opens a web form with a login.

How to prioritise passkey over password for autofill?