pxe chain to nvme

[Michael DiDomenico]

i'm having a little trouble getting grub2 to chain load from pxe to an
nvme drive.  i'm certainly doing something wrong or missing something

currently, my server is set to boot by default via pxe.  pxe boots a
uefi grub2 instance which pulls in this config file

menuentry "local disk" {
  insmod chain
  search --set=root --file /EFI/redhat/grubx64.efi
  chainloader /EFI/redhat/grubx64.fi
}

for just about every other server this seems to work okay, but not
this one, and this is the first server i have using internal nvme
drives.  the drivers are behind a raid controller HPE NS204i-t Gen10

when grub2 tries to execute the 'local disk' menu entry.  i get an
error that says /EFI/redhat/grubx64.efi could not be found.  sure
enough if i drop to command prompt and do an 'ls' no drives are
returned

is there something funny about this disk controller?  or is there some
other step in grub2 that i need to do in order to see the drives when
the drivers are nvme?

if i boot the system via the disk controller, selected from the
one-time boot menu, the server does boot