From: Justin M. Forbes on gitlab.com https://gitlab.com/cki-project/kernel-ark/-/merge_requests/2175#note_1272255...
I believe the correct method is just to change the buildreq to systemd-boot- unsigned for everything, and add a note to redhat/rebase-notes.txt to revert that new MR for stable fedora until F37 is EOL. os-build does not build kernels for anything other than rawhide, and when I do branch for stable Fedora, that branch will not build kernels for ELN/RHEL, so the current behavior is correct.