If you initially installed in UEFI mode, then of course, the bios version of grub is removed. This is intentional as you don't need it when you are booting in UEFI mode. If you want to change, then you need to install the bios package and should remove the UEFI one if you don't need it.
** Changed in: grub2 (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1766018 Title: grub-pc-bin not available on chroot fresh install To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1766018/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs