Opening new issue, as instructed by @enricogior:

@Mercerudy
you have two monitors with the same 1920x1080 resolution, correct?
The Windows API returns only one monitor. We should try to escalate this to the Windows team.
Can you please open a new issue adding the output of the WMI command you ran and the screenshot of the Device Manager?

Originally posted by @enricogior in #1777 (comment)

I have two Samsung 1920x1080 monitors with drivers installed on Windows 10 20H2 Build 19042.541.

Device Manager:

The following WMI commands, Get-WmiObject win32_videocontroller and Get-WmiObject win32_desktopmonitor, return the following output, showing only 1 monitor:
WMI_Monitor_Info.txt

This renders me unable to set desktop zones on each monitor independently via MS PowerToys FancyZones.