I played around a bit with checking via SSH and found that installing OpenSSH on the Windows machines and using Nagios-checks via SSH works quite fine.
However, I do not recommend to use the inbuilt feature “OpenSSH” that Server 2019/Win 10 or newer offer as it is a rather old version and lacks some subcommands.
There is an official package for Windows available that should work on almost all Windows-versions: Releases · PowerShell/Win32-OpenSSH · GitHub
Give it a try, for me I was able to replace all nasty WMI-checks in PRTG with SSH-based checks in LibreNMS now.