[…]Include Grub’s “verify,” “cryptodisk,” “luks” and <others here> modules in grubx64.efi of the ‘grub2-efi-x64’ package. Users utilising secure boot functionality on the UEFI platform cannot insert modules that aren’t in grubx64.efi. Paradoxically, this means that security-conscious users cannot use grub’s verify module, or employ (near) full disk encryption using cryptodisk and luks. The security benefits of signature verification would reach more users if Fedora automated it by incorporating the process into grub2-mkconfig. For the long-term, to grant flexibility with grub2 modules on secure boot instances, it may be advisable to sign the .mod files in the ‘grub2-efi-x64-modules’ package, modify grub2-mkconfig (or -install) to copy the necessary modules into the EFI partition when required by the user’s configuration and then allow inserting of signed modules in secure boot instances.[…]
https://fedoraproject.org/wiki/Changes/Include_security_modules_in_efi_Grub2
https://www.phoronix.com/scan.php?page=news_item&px=GRUB2-New-EFI-Modules-For-F31
Firmware Security 