Step 1: Register iPhone Face ID
Click the dropdown in the upper right-hand corner of the portal
Select "Manage WebAuthn"
NOTE: These steps should only be performed on your iphone
Step 2: Register iPhone Face ID
Click "Add Device"
Enter descriptive name
Select "This Device"
Step 3: Register iPhone
Tap "Continue" and look at phone
Now your device is registered
Logout of the portal and login using Face ID