RancherOS on Hyper-V - only Generation 1?

I have successfully installed RancherOS on Hyper-V on Windows 10 but the installed process raised some question marks.

  1. RachnerOS does not support UEFI, does it? I was not able to install it in a Generation 2 Hyper-V VM.
  2. You have to allocate at least 1.5 GB RAM to the VM otherwise you get No space left on device although the docs say 1 GB is enough. Why this difference?
    Dynamic RAM is active.
  3. After install, I could reduce it to 768 MB but this is still a lot comparing it with the RAM of the Raspberry Pi 3, what is officially supported. How can that be?
    Dynamic RAM is active.