You should always plan for your currently active device to be bricked suddenly and act accordingly.
You either should treat your passkeys with a backup like any data, this can mean multiple hardware keys or a cloud backup of your passkey, like bitwarden or the provider's native backups.
You either should treat your passkeys with a backup like any data, this can mean multiple hardware keys or a cloud backup of your passkey, like bitwarden or the provider's native backups.