In order for BIOS to show a UEFI boot option for a fixed disk, there are only two possibilities:
EFI\boot\bootX64.efi
stored in the root folder
BIOS always builds a boot option for removable media regardless of media presence. The virtual media (virtual Floppy and Virtual CD) should show up in the UEFI boot menu as removable device boot options. If they do not show up, then they were disabled.