As discussed in #522 and in the comments on https://docs.microsoft.com/en-us/windows-hardware/drivers/hid/virtual-hid-framework--vhf-:
It seems that custom HID reports do not work well with the HID Injector. I could inject the keyboard HID reports from the sample, they seemed to work.

However when I changed the HID reports AND the HID report descriptors to emulate a radial controller, nothing happened anymore. The wheel tab in the settings app appeared (showing that windows properly recognized the HID report descriptors) but the HID events did not work.

I'll post code later so that it can be reproduced.