Recently the openSUSE project released for MicroOS and Tumbleweed a new version of the GRUB2 package, with a new subpackage grub2-$ARCH-efi-bls. This subpackage deliver a new EFI file, grubbls.efi, that can be used as replacement of the traditional grub.efi.
This is a companion discussion topic for the original entry at https://news.opensuse.org/2024/10/08/grub2-bls/