Windows 11 doesn’t gonna allow you to add “Fedora” in list so you have to manage with GRUB side. For your GRUB problem it is weird that It didn’t see it. But I have couple questions
- Are you using UEFI ?
2 Is your Secure Boot enabled ?
You can also try to use
# grub2-mkconfig -o /boot/grub2/grub.cfg
as root for re-generate grub entries maybe It will detect without further investigate.