rearでのバックアップがうまくいかない

環境
vsphere7
Centos8.1
Relax-and-Recover 2.6

rearでフルバックアップisoを作成して、同じスペックの仮想マシンを用意しisoで起動したのですがディスクを認識してくれずリストア出来ません…というかディスクとして認識してくれてない…

予想としては
bootだけうまいこと作成されていない様な出力が見られるからそれが原因かなと…以下抜粋

Did not find /boot/grub2/locale files (minor issue for UEFI ISO boot)

まずはインストール

dnf -y install rear syslinux-extlinux grub2-efi-x64-modules

設定ファイル
OUTPUT=ISO
OUTPUT_URL=nfs://192.168.1.96/mnt/public
BACKUP=NETFS
BACKUP_URL=iso:///media/bk/

からの実行

rear -v mkbackup

一応isoファイルは作成されるのですがログを見るとbootがそもそも作れてない？ような感じになってしまっております。

実行時の表示

Relax-and-Recover 2.6 / 2020-06-17
Running rear mkbackup (PID 33300)
Using log file: /var/log/rear/rear-localhost.log
Running workflow mkbackup on the normal/original system
Using backup archive '/tmp/rear.DwWE1msPaWcMdyG/tmp/isofs/media/bk//backup.tar.gz'
Using UEFI Boot Loader for Linux (USING_UEFI_BOOTLOADER=1)
Using autodetected kernel '/boot/vmlinuz-4.18.0-348.2.1.el8_5.x86_64' as kernel in the recovery system
Creating disk layout
Using guessed bootloader 'EFI' (found in first bytes on /dev/sda)
Verifying that the entries in /var/lib/rear/layout/disklayout.conf are correct ...
Creating recovery system root filesystem skeleton layout
Skipping 'virbr0': not bound to any physical interface.
To log into the recovery system via ssh set up /root/.ssh/authorized_keys or specify SSH_ROOT_PASSWORD
Trying to find what to use as UEFI bootloader...
Trying to find a 'well known file' to be used as UEFI bootloader...
Using '/boot/efi/EFI/centos/grubx64.efi' as UEFI bootloader file
Copying logfile /var/log/rear/rear-localhost.log into initramfs as '/tmp/rear-localhost-partial-2021-12-16T11:07:05-05:00.log'
Copying files and directories
Copying binaries and libraries
Copying all kernel modules in /lib/modules/4.18.0-348.2.1.el8_5.x86_64 (MODULES contains 'all_modules')
Copying all files in /lib*/firmware/
Broken symlink '/usr/lib/modules/4.18.0-348.2.1.el8_5.x86_64/build' in recovery system because 'readlink' cannot determine its link target
Broken symlink '/usr/lib/modules/4.18.0-348.2.1.el8_5.x86_64/source' in recovery system because 'readlink' cannot determine its link target
Testing that the recovery system in /tmp/rear.DwWE1msPaWcMdyG/rootfs contains a usable system
Creating recovery/rescue system initramfs/initrd initrd.cgz with gzip default compression
Created initrd.cgz with gzip default compression (435033640 bytes) in 31 seconds
Making backup (using backup method NETFS)
Creating tar archive '/tmp/rear.DwWE1msPaWcMdyG/tmp/isofs/media/bk//backup.tar.gz'
Archived 2229 MiB [avg 12207 KiB/sec] OK
Archived 2229 MiB in 188 seconds [avg 12142 KiB/sec]
GRUB2 modules to load: fat part_gpt xfs
Did not find /boot/grub2/locale files (minor issue for UEFI ISO boot)
Making ISO image
Wrote ISO image: /var/lib/rear/output/rear-localhost.iso (2.7G)
Copying resulting files to nfs location
Saving /var/log/rear/rear-localhost.log as rear-localhost.log to nfs location
Copying result files '/var/lib/rear/output/rear-localhost.iso /tmp/rear.DwWE1msPaWcMdyG/tmp/VERSION /tmp/rear.DwWE1msPaWcMdyG/tmp/README /tmp/rear.DwWE1msPaWcMdyG/tmp/rear-localhost.log' to /tmp/rear.DwWE1msPaWcMdyG/outputfs/localhost at nfs location
Exiting rear mkbackup (PID 33300) and its descendant processes ...
Running exit tasks

宗教上の理由からrearを使わなければいけなくて泣きそうになりながら色々調べているんですが解決できなくて。。。
有識者の方が居ましたらご教授下さい！