No, you misunderstood. Just fire up the linux vm on linux kvm with hypervisor hidden, that you already had. You just didn’t post a dmesg from it.
Do you know if the the nvidia driver is able to run without INTx support? At the moment bhyve doesn’t support it. So GPU passthrough for WIndows 10 won’t work when the driver requires INTx support until we either force the driver to use MSI/MSI-X or until we add support for INTx for bhyve.