And what about password sharing? I want to share everything with my partner,in case something happens to me.
Passwords right now are outright better.
And by the way, door keys could be copied.
1Password family plan, and I assume similar cloud password managers, let you organize passwords/TOTP/Passkeys into vaults, and you can put credentials you want to share with other family members here.
You can store passkeys in a password manager where they're either in a full-time shared config or there's some configuration that allows access if something happens. (e.g. Emergency Kit for 1Password, legacy contact for Apple account, etc.)