If you are unable to login into your Google Account using your standard 2-Step Verification, you can utilize a backup code for the second step. Create backup codes in case you lose your phone, change your phone number, or are unable to receive codes via SMS, phone, or Google Authenticator.
How can you regain a Google Account if you can't acquire two-step verification because you no longer have access to that phone?Use backup codes for account recovery.
If you need to recover an account, utilize the backup codes. Accounts are still secured by 2SV, and backup codes are simple to create.