Hello
The hyper-v mangement tool is fixed by reinstalling the hyper-v feature, right?
Verify whether it is shown in "Control Panel\All Control Panel Items\Administrative Tools" control panel. If it is not shown here. The shortcut may be corruted.
The related component may be corrupted. We could open administrator command line and run "sfc /scannow" or "DISM /Online /Cleanup-Image /RestoreHealth" to check the health of system files.
It could be permission issue, too. Try to create a new administrator account then check the issue again.