@moussa854 ok bruh....soooo.... you might want to check your bios settings and make sure VT-d is enabled or if you are on a AMD rig IOMMU or AMD-Vi is enabled. I feel so dumb and overlooked this and after enabling VT-d on my rig everything worked as expected.

I have the exact same issue. I have a fresh install of xcp-ng and followed the documentation to a "T"! Install version is xcp-ng-8.1.0-2. I really hope to get an answer soon about this.