How to bypass two-factor authentication?

The passcode to unlock your phone/iPad has nothing to do with 2FA.

Directions for turning off passcode:

1. From a Home screen on your iPhone, navigate: Settings  > Face ID & Passcode.
2. Enter your passcode then tap Turn Passcode Off. 
3. When the passcode is turned off, Face ID is disabled.
4. Enter your passcode to confirm.
5. If prompted, enter the Apple ID Password then tap Turn off.

Hi gdkirk,

We appreciate you reaching out to us about your Apple ID on your iPhone and iPad. Rest assured that we’ll do our best to assist you.

We recommend updating your devices if you haven’t. While it isn't inherently assured that an update will resolve the issue, updating to the latest version of iOS can help isolate potential software issues. You can use the articles below to guide you on how to secure a backup and update the devices.

How to back up your iPhone, iPad, and iPod touch

Update your iPhone, iPad, or iPod touch

Also, have you had the chance to check if your Apple ID account details are up to date?

You can update your Apple ID account details here: Manage your Apple ID

If the issue persists, let us know if you experience the issue when using a certain Wi-Fi network or when using a VPN.

Cheers!