You can put your passkey in another safe. I store mine in my vaultwarden. You can also do keepass with a plugin. You don't have to store it on your phone.
> I store mine in my vaultwarden.
Can you export it from there? My main gripe with passkeys in 1Password is that seemingly you can't export them, unless you export it to "someone else", which isn't clear if that someone can be just "you".
What if they meant a real safe? The big metal kind.