Well Face ID has stopped working abruptly and will not allow set up of a new one. After using my Google Foo, reviewing/trying all of the Apple Support articles, AND going through the Support Communities, Apple has asked me to bring in my iPhone 11.
Software update (13.2)
Power cycle (3 times)
Hard reboot (2 times)
Erase all content and restored from iCloud backup
I’ll update this post after discussion with the “Genius Bar”.!