You'll get a QR code or setup key. Next, open the Google Authenticator app and tap the plus sign. Record the 2FA code/key. Whenever you're asked for the 2FA code, open Google Authenticator to find it.

You’ll then get a QR code that you’ll then scan on a Google Authenticator (version 5.10+) app on another device—using the “Import accounts” feature from the “Transfer accounts ...

If you transfer multiple accounts, your old phone may create more than one QR code. On your new phone's Authenticator app, tap Scan QR code. After you scan your QR codes, you get a confirmation that ...

Authenticator apps get around this problem by letting you generate your own verification code. That makes you less likely to be hacked, and more likely to recover your account if you are.