How can I revert back to the previous dom0 kernel?

sudo nano /boot/efi/EFI/qubes/xen.cfg seems to be an old instruction for R4.0: Cannot boot into Qubes 4.1 - what has changed in 4.1 boot routine (UEFI)? - #5 by icequbes1

When using the Grub2 option on R4.1 with UEFI, I do see multiple boot options for different kernel versions. However, when I try to boot any of these, I get:

Loading Xen 4.14.6.config
error: no multiboot header found
Loading Linux 6.5.8-1.qubes.fc32.x86_64 *(or any other installed version)*
error: you need to load the kernel first
Loading initial ramdisk
error: you need to load the kernel first

It seems to me default kernel is already loaded by EFI, so the Grub2 option does not work because I use EFI boot.
The linked post above mentions that for 4.1, you can simply edit the boot entry by hitting e during boot. First of all, that’s not really a solution because then you have to do that every boot. Secondly, when I manually change all displayed kernel versions to another installed kernel version, the system freezes at the disk password screen.

Does anyone know how to change dom0 kernel versoin on R4.1 with EFI?