Ah, the command line seems to be the issue.
Run grep "rhgb quiet" /etc/default/grub to check if it should be getting into grub’s config based on your settings. I’ll presume that you won’t get a result and in which case you should add “rhgb quiet” to the end of the “GRUB_CMDLINE_LINUX” line in /etc/default/grub.
If you do get something from grep, run sudo grep "rhgb quiet" /boot/efi/EFI/fedora/grub.cfg.