There are a few measures you can take to fix the issue. You can use backup options like a second device that’s already logged in with your Google account, or second added phone number, or you can use a backup code that you’ve previously saved. Lastly, to fix Gmail 2-factor authentication issue, you can use the security key that Gmail assigned you previously to login to your account. If none of these solutions work, you can login from a recognized device.

#gmail 2-factor authentication issue