Should I set up Dad's passkey now or wait until he replaces his phone?

Dad read the sign-in prompt and asked, ‘If my fingerprint becomes the password, what happens when this phone breaks?’ I started explaining passkeys, then noticed he was holding the charger against the phone because the connection kept slipping.

He uses his personal Google account for email and his travel confirmations. He has 2-Step Verification on and wants a new phone next month. I had offered to help add a passkey now because he finds the current sign-in sequence annoying. He heard ‘one less thing to remember’; I heard ‘one more thing to organise before the old phone stops working.’

Google says adding a passkey does not remove the authentication or recovery factors already on an account. It also says to create passkeys only on devices you personally own and use. [Google Account Help](https://support.google.com/accounts/answer/13548313?hl=en). That answers part of his worry, but neither of us has checked his other sign-in options recently.

He has offered Saturday afternoon for this, not a whole weekend of account housekeeping. Would it be better to use that time to check recovery and explain one new method, or wait and make it part of setting up the replacement? I do not want my help to leave him dependent on my phone.