I have tried to hide the Grub boot with Fedora 34 with the following commands:
sudo grub2-editenv - set menu_auto_hide=1
sudo grub2-mkconfig -o /etc/grub2-efi.cfg
But nothing happens, the Grub Boot menu keeps showing up with a 5 sec countdown, I have only one kernel 5.14.9. Any advise how to completely hide Grub at boot.