Hi chroak,
Thanks for following up with us and sharing this screenshot.
Are you using iOS 14.1 on your device? Update your iPhone, iPad, or iPod touch
Have you been able to unlock your device with Face ID otherwise?
Have you tried to Restart your iPhone yet?
If you tap Settings > Face ID & Passcode and turn iTunes & App Store off there, are you able to download using just your Apple ID password? If so, try toggling iTunes & App Store back on there and test again.
If none of the above helps, tap Settings > [name] > Media & Purchases. Then tap the icon in the top left and sign out of your Apple ID, and then sign back in and test. Keep in mind when you do this, any offline Apple Music content will be removed and you would need to re-download it after.
Let us know how it goes.
Cheers!