Yes. If you're ever unable to access your authenticator app (e.g., you lose or misplace your device), you can log in to your account using one of the backup codes you received when setting up 2FA.
Enter your email address and password, then enter one of the backup codes to access your Activision account.
For security reasons, you may use each backup code one time only.
If you’re having issues logging in to your account with 2FA, check your inbox for your 2FA backup codes. Email subject: Two-Factor Authentication Enabled
IMPORTANT! Backup codes should not be used as the primary way to log in to your account. Only use a backup code when you cannot access your authenticator app (e.g., lost, broken, or new device). If you get a new device, be sure to disable and then reenable 2FA on your Activision account using a supported authenticator app* on your new device.
* Authy, Duo Mobile, Google Authenticator, or Microsoft Authenticator