Their only docs suggest using an authenticator app (which presumably runs on the 'phone which potentially can be lost' anyway) is possible: https://support.goog

Their only docs suggest using an authenticator app (which presumably runs on the 'phone which potentially can be lost' anyway) is possible: https://support.google.com/accounts/answer/1066447?hl=en&ref_topic=2954345 https://support.google.com/accounts/answer/1066447?hl=en&ref... If it's not showing up for you, you'd need to contact their support team to find out why.