The Kickstart default PXEGrub2 template uses the linuxefi and initrdefi commands for all EFI except EL<7,

if (rhel_compatible && os_major < 7) || !@host.pxe_loader_efi?
  # Grub EFI commands are RHEL7+ only (prevents "Kernel is too old") or for non-EFI arch
  linuxcmd = "linux" 
  initrdcmd = "initrd" 
else
  linuxcmd = "linuxefi" 
  initrdcmd = "initrdefi" 
end

but attempting to use the linuxefi and initrdefi commands with grubaa64.efi results in

error: ../../grub-core/script/function.c:119:can't find command `linuxefi'.
error: ../../grub-core/script/function.c:119:can't find command `initrdefi'.

This is on my one-and-only aarch64 host, but as far as I can tell the patch which adds those commands to Grub only does so for x86/64. I'm planning to make a pull request, but it gives me pause wondering has everyone who ever PXE Kickstarted aarch64 with Foreman just been silently overriding the template and moving on, or am I way off base here?