Backup of GRUB2 on both UEFI and BIOS systems

Currently I have two laptops dual booting Ubuntu 19.04 and Windows 10:

  1. Asus G74SX – dual boot on the same SSD (BIOS)
  2. Dell XPS 13 9350 – dual boot on the same NVMe SSD (UEFI)

I have both laptops backed up with Macrium Reflect but I always have this fear that the image backups do not restore the GRUB2 somehow.