It's not possible to have Google authenticator on multiple devices with the same accounts on it.
It's easy to transfer from one to the other but that doesn't remove the single point of failure.
Solution is to have back up codes for each account.
It's easy to transfer from one to the other but that doesn't remove the single point of failure.
Solution is to have back up codes for each account.
But of course, keeping emergency codes is a good idea too.
It's worth also noting that Authy also has no official way to export your secrets, although there are workarounds: https://tij.me/blog/migrating-your-one-time-passwords-from-a...
Otherwise you’re going to lock a lot of people out of their accounts which is not acceptable.
Ultimately this typically ends up with a reset scheme that depends on phone numbers or email addresses which means the protection, which is as strong as the weakest link, is worthless.