Grub bootloader doesn't show up

[Eli]

I encountered exactly the same problem (with the additional problem that my disk is encrypted, so I can’t load kernel image that is encrypted).

In UEFI bios options, one could select Add a Bios Option. That opens up all available drives in the computer. For each drive, it will find the system partition and shows available files. I essentially have two relevant files: grub.cfg and grubx86.efi. I selected both and each time defined a new boot option. I always end up with grub shell. My system partition has a EFI folder that contains just a few config files. The kernel images are encrypted, and not there,

Has a solution to this issue been found?

I explained the my issue at end of the comments in this thread:

BIOS settings

If you have default Qubes OS partitioning then you should have 3 partitions e.g.: /dev/sda1 - EFI System partition /dev/sda2 - ext4 /boot partition - this partition in unencrypted by default and should contain your initramfs that grub is looking for /dev/sda3 - LUKS encrypted LVM partition So check your /boot partition content and check its UUID, compare it with the UUID and files that grub is looking for.