There is no option to access your previous Google authenticator. If you lose your original device without first exporting, your Authenticator, you will not be able to access any of those accounts that you have with a two-step verification, uses us authenticator there is no other option. It may appear that there is one, but there really isn’t. There is no back up for Google authenticator.
To use Google Authenticator with Google, you need to enable 2-Step Verification on your Google Account. This is a convenient way to move your accounts to a new device. Transfer accounts between devices with a QR code.You can choose the type of code generation that best suits your needs. Support for time-based and counter-based code generation.You can use the Authenticator app to manage multiple accounts, so you don't have to switch between apps every time you need to sign in. This is quick and easy, and it helps to ensure that your codes are set up correctly. Set up your Authenticator accounts automatically with a QR code.This way, you can always access them even if you lose your phone. Sync your Authenticator codes to your Google Account and across your devices.The verification code can be generated by the Google Authenticator app on your phone, even if you don't have a network or cellular connection. This means that in addition to your password, you'll also need to enter a code that is generated by the Google Authenticator app on your phone.
Google Authenticator adds an extra layer of security to your online accounts by adding a second step of verification when you sign in.