Hi Kristian,
What OS do you have running hyper-v (Win 10/11 or server)?
I recently got a Sonoff 3.0 (and an Aeotec 5) running very simply under the default haos virtual disk on a WIindows 2022 Server host. Hyper-v doesn’t support USB pass through, but, since 2016, it does support PCI device pass through - DDA. So I got a PCI USB card, passed that to the vm, plug the devices into the card and they appeared properly in the vm. HA detected them automatically. There’s a writeup of exactly what I did on another thread: https://community.home-assistant.io/t/ha-on-hyper-v-with-z-wave-and-zigbee-it-works/552529?u=blaal02
I don’t know if DDA is supported on win 10/11.