Standalone HVM Windows 10 Pro does not detect the second monitor

Hi,

A Standalone HVM Windows 10 Pro does not detect the second monitor.
In Qubes-OS the second monitor works fine. But in standalone HVM Windows 10 Pro the second monitor is not detected.
I read issues #2487 #1704 #1896, but could not find the answers. I installed QWT, but it did not help.
How to extend Windows 10 to the second monitor in standalone HVM?

QUBES OS version 4.1.1
Windows 10 PRO