Here is a bootentry that does work for a regular qemu hard-drive:
Boot0007* 'ubuntu-custom-normal' ACPI(a0341d0,0)PCI(1,1)ATAPI(0,0,0)HD(1,800,f3800,075e987d-5ca9-4c04-82f1-7967bc2dca5f)File(\EFI\ubuntu\shimx64.efi)
Which is also addressing by partuuid.
Here is a bootentry that does work for a regular qemu hard-drive:
Boot0007* 'ubuntu- custom- normal' ACPI(a0341d0, 0)PCI(1, 1)ATAPI( 0,0,0)HD( 1,800,f3800, 075e987d- 5ca9-4c04- 82f1-7967bc2dca 5f)File( \EFI\ubuntu\ shimx64. efi)
Which is also addressing by partuuid.