What were you trying to do that didn't work?

grub2-install refuses to work on efi because it creates unsigned binaries, which are incompatible with Secure Boot. Users who want this functionality anyway could have it if they use --force

request is for RHEL-9, so that is propogates also to clones: https://github.com/hetzneronline/installimage/issues/57

already merged in fedora: https://github.com/rhboot/grub2/pull/135