As addressed in MSI motherboards defy boot manager after BIOS update the question is why

https_proxy= http_proxy= dnf -y install grub2-efi-x64-modules
https_proxy= http_proxy= wget --secure-protocol=TLSv1_2 -O grub2-efi-x64-modules-2.04-21.fc32.noarch.rpm ""

fail in a Secure Shell or under chroot when a system has become unusable. Is this a sensitive topic?

Which options are available, if both bare metal installation I have are not working any more?

The solution is provided here.