I had another project to finish, sorry for silence.
You probably need to change dos to gpt.
But you don’t want to create storage pool on that disk, just pick some file name and then change it to /dev/nvme1n1 in xml
Or just do this Ad Hardware->Storage->Custom storage->Enter /dev/nvme1n1 manually:
Edit: One more thing, because I have itching feeling that you have the same problem originally.
So if you didn’t do it recently, then just in case, try to reset you bios and enable iommu stuff. Good basic step especially after bios update. I usually assume people done already before troubleshooting.