Sorry - the image is to small for me to read :-/ - can you compare to this:
menuentry 'Qubes, with Xen 4.14.5 and Linux 5.15.94-1.qubes.fc32.x86_64' --class qubes --class gnu-linux --class gnu --class os --class xen $menuentry_id_option 'xen-gnulinux-5.15.94-1.qubes.fc32.x86_64-advanced-/dev/mapper/qubes_dom0-root' {
insmod part_gpt
insmod ext2
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root 515d20d3
else
search --no-floppy --fs-uuid --set=root 515d20d3
fi
echo 'Loading Xen 4.14.5 ...'
if [ "$grub_platform" = "pc" -o "$grub_platform" = "" ]; then
xen_rm_opts=
else
xen_rm_opts="no-real-mode edd=off"
fi
multiboot2 /xen-4.14.5.gz placeholder console=none dom0_mem=min:1024M dom0_mem=max:4096M ucode=scan smt=off gnttab_max_frames=2048 gnttab_max_maptrack_frames=4096 ${xen_rm_opts}
echo 'Loading Linux 5.15.94-1.qubes.fc32.x86_64 ...'
module2 /vmlinuz-5.15.94-1.qubes.fc32.x86_64 placeholder root=/dev/mapper/qubes_dom0-root ro rd.luks.uuid=luks-5e938f35 rd.lvm.lv=qubes_dom0/root rd.lvm.lv=qubes_dom0/swap plymouth.ignore-serial-consoles rd.driver.pre=btrfs rhgb quiet rd.qubes.hide_all_usb
echo 'Loading initial ramdisk ...'
module2 --nounzip /initramfs-5.15.94-1.qubes.fc32.x86_64.img
}
?
(my default kernel is kernel-latest - that’s why the kernel version is included in the menuentry name)