Hi,
The Fusion virtual machine bundle is not using any file system specific features that are problematic for restoring on another platform such as VMware Workstation.
It is also unlikely for VMware to start depend on such a file system specific feature as it would mean problems for their own cross platform approach.
You can bring your Fusion VM to Workstation or even vSphere and provided you use the correct virtual disk format it will mostly just work.
FWIW, the virtual machine backup program I developed (Vimalin see my signature for more info) does offer your request as a feature.
You can restore a Fusion VM on VMware Workstation Professional as you can import backups made by either product and Vimalin will handle the restore.
Oh I forgot, the easiest way to do this is not by reading directly from an attached disk and file system but by using network shares.
Nowadays macOS can read/write quite well on SMB network shares. If you're uncomfortable by that then you can present a share both as NFS for macOS and as SMB for Windows.
Hope this helps,
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Wil