Pass Through Multiple GPUs to Virtual Machine with Hyper-V?

I followed this tutorial to try and pass through GPUs to a Hyper-V virtual machine:

“Two Gamers, One GPU from your Windows PC! Hyper-V Paravirtualization Build and Tutorial” on YouTube, by “Craft Computing”. Sorry, I don’t have permission to link it.

My system has two NVIDIA 1080 Ti GPUs in it; and for some reason only one of them is fully working. Both of them show up in device manager in the Hyper-V VM:

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But in my application that utilizes the GPUs, only one shows up. Here is what I see in my Hyper-V virtual machine:

image

As expected, when attempting to complete the GPU rendering in the VM, it only uses one of the two GPUs.

Is there any way to pass through both of them to the VM instead of only one?