AFTER 2 DAYS OF STRUGGLES IM BOOTING!
open grub that was still left over from my fedora install,
> set root=(hd0,gpt4)
> linux /vmlinuz....x86_64 root=/dev/mapper/rl-root
> initrd /initramfs....img
> boot
told me finally that the only broken mount now was my boot/efi, which is for some reason also a separate partition? hd0,gpt5, EFI filesystem. I found that the fstab UUID didn’t match the new UUID, so I manually edited it. Now I redid that grub setting, and I’m in!
Now to figure out how to fix grub so I don’t have to manually enter those settings every time, and can remove my old fedora grub partition (which I think saved me today)