Let’s clear some things up here if you don’t mind.
All HyperV hosts can only run Windows and certain Linux distros, this is not a limitation of the free offering.
Passthrough is also not available for most types of hardware in all versions of HyperV. An imperfect workaround is to use passthrough with Remote Desktop. I’m not telling you it’s good I’m telling you it exists.
HyperV server has a basic cli interface and it is indeed harder to manage than Windows Server with a desktop experience. When using the Server Core versions which do not have the desktop experience or the LTSC versions, the ui is the same. Some commands are not available.
Yes there has not been a release of the dedicated HyperV offering since 2016. It does not mean Microsoft will not release another one.