I do not know which side the problem is: Haiku or Hyper-V.
With the standard procedure for creating a VM, the Haiku was not even loaded.
In order to install Haiku, I had to choose “Generation 1” when creating VM.
And to make the network work, I had to remove the default network adapter and add Legacy Net. Adapter.
In the past, I put Ubuntu and Debian. If I remember correctly, they worked fine. At least, I can not remember the inconvenience associated with the lack of scrolling. Unfortunately, the version with GUI these OSs are quite heavy for my system. And they did not take root.
Of course, a bunch of guest Windows of different versions works normally and stably, as one would expect for a hypervisor embedded in Windows host.
I didn’t even try to check the scroll with other mouse, because I understand that the VM works with emulated devices.
Now with a direct question and to clear my conscience, I checked another wireless mouse and a regular USB Mouse with a cord. It did not help – it’s not the mice issue.
I experience the same issue with Hyper-V as the original reporter - mouse scroll is not working for at least this build (which should be one of fresh ones all in all) - haiku-master-hrev53903-x86_64-anyboot