I useSuper-UEFIinSecureBoot-Disk_minimal_v3.zip , download it and dd the diskimg to a USB drive and boot to its embedded grub with secure boot. And then chainloader vdiskchain and it boot fine. (I only test it on VMware with secure boot. My laptop is old and doesn't support secure boot)
In real life booting from USB SSD in UEFI Secure mode using Super UEFI grubx64.efi and Super UEFI grub2 system in \EFI\grub\x86_64-efi does not work for me.
I am still getting Secure Boot conflict with KALI internal /boot/grub/x86_64-efi/normal.mod
Anyway for KAL Linux I can always make use in UEFI Secure mode booting from RAMDISK with kali-linux-2020.3-live-amd64.iso
renamed to kali-linux.iso in folder images and using Mint UEFI Secure booting is working OK .....
a1ive Grub2 2020-08-26 of UEFI_MULTI-50 supports booting \iso\kali-linux-2020.3-live-amd64.iso from RAMDISK using Linux GLIM menu
a1ive Grub2 2021-01-04 of UEFI_MULTI-55 does NOT support booting \iso\kali-linux-2020.3-live-amd64.iso from RAMDISK using Linux GLIM menu - systemd-udevd unsigned problem