If you previously used your fingerprint or face to log into the Virgin Money Credit Card app and it has stopped working, follow these steps the next time you log in:
• Tap the profile icon at the top of the app
• Select ‘Sign in and security’
• Use the toggle on the right-hand side to enable biometric login
If the toggle is already switched on, turn it off, then turn it back on again to reset it.

There’s no More button, there’s no settings option and there appears to be no way to activate Face ID in your credit card app since the latest update
I suggest that when you do an upgrade, you make sure your website has the appropriate advice at the same time...