I have a Proxmox VM with an NVMe boot drive passed through to it via PCIe passthrough and am unable to to modify the boot order to prioritize NVMe boot over the UEFI shell. This problem appears to be the same issue posted about here, but that thread is over a month old and received no responses. Has any one else encountered this problem? It would appear that there are two problems with the way Proxmox behaves here: it does not include passed-through drives in the boot order configuration options, and it also does not save any changes made via the OVMF graphical interface despite the presence of an attached EFI disk. Finding a way to resolve either of these shortcomings should allow for a potential workaround.