First, thanks for your work on this.
On our Lenovo ThinkPad machines, Windows Hello "Add a fingerprint" works fine and we use it reliably to unlock the desktop screen. So i do not believe there is a problem with HELLO per se.
However, WinHello would only prompt for a fingerprint to unlock KeePass about one time out twenty. When it does let me use my fingerprint and move on with life unencumbered, the joy is indescribable. What can i do to troubleshoot?