In
https://github.com/theforeman/foreman/blame/e2161596bb7e420e31fbb311e4768606effb715a/app/views/unattended/provisioning_templates/snippet/pxegrub2_chainload.erb#L34
connectefi scsi for grub2 was added by turned off by default.

As https://git.almalinux.org/rpms/grub2/src/branch/c8/SPECS/grub2.spec#L592 and https://github.com/rhboot/grub2/blame/205b7b44bb2a7911f1e8c1ce22d66c111a4b429e/NEWS#L101 mentioned, this feature should be available for all up to date grub2 versions. Therefore, it should be enabled by default.