/boot/efi File format not supported while Installing in RHEL 8 in UEFI Secure boot or Secure boot disabled mode.

RHEL 8 supports UEFI in Secure Boot enabled as well as with Disabled mode. That is a very good change, as Most of the new machines only support UEFI mode.

But while installing RHEL 8 with UEFI mode,
while in custom partition in LVM mode;

I had to choose both
/boot in standard partition
/boot/efi
"

Why not only /boot/efi works ?

I tried going with /boot/efi in different file formats,
after removing " /boot" it says format not supported.

But when I keep the partitioning as such with LVM.

/
/boot
/boot/efi
/swap

It works fine.