Instead of using the chroot button, which is probably generating that error, try to follow carefully the tutorial "how to chroot garuda linux".
Boot from the live USB and open a terminal (do not use the chroot button).
sudo mkdir /mnt/broken
Otherwise /mnt alone already exists.
Do not use /dev/sdxy, that's only an example.
Check your disk with lsblk -f as instructed in the guide to identify the system partition to mount.
There are also indications to verify if your system is in UEFI or legacy mode.
Edit: looking more carefully into your privatebin, I think the chroot actually worked! You didn't need the additional commands to do it manually.
See that you were root # in your installed system partition /dev/nvme1n1p2
Do that again and proceed with the suggestions in the previous posts.
Sorry for the late reply but sadly this did not work. At this point im thinking about resetting my PC. Just one question if you don't mind, is their a way to gain access to the root folder so i can transfer the contents to another drive?
OK. So the grub installation and update-grub were succesful.
I guess you tried to reboot and got the same error?
Installing for x86_64-efi platform.
Installation finished. No error reported.
Generating grub configuration file ...
Found theme: /usr/share/grub/themes/garuda-dr460nized/theme.txt
Found linux image: /boot/vmlinuz-linux-zen Found initrd image: /boot/intel-ucode.img /boot/initramfs-linux-zen.img
Found fallback initrd image(s) in /boot: intel-ucode.img initramfs-linux-zen-fallback.img
Found linux image: /boot/vmlinuz-linux
Found initrd image: /boot/intel-ucode.img /boot/initramfs-linux.img
Found fallback initrd image(s) in /boot: intel-ucode.img initramfs-linux-fallback.img
I've also put in bold the files which were not found.
Don't care about this. It is related to the USB drive itself...
grub-probe: error: cannot find a GRUB drive for /dev/sdc1. Check your device.map.
Error! Your kernel headers for kernel 5.15.5-zen1-1-zen cannot be found at /usr/lib/modules/5.15.5-zen1-1-zen/build or /usr/lib/modules/5.15.5-zen1-1-zen/source.
Please install the linux-headers-5.15.5-zen1-1-zen package or use the --kernelsourcedir option to tell DKMS where it's located.
I don't see anything wrong in the linux-zen and headers installation.
There are some errors for the snapshot part, but I think that's normal in the chroot.
I'd reconsider the other solution above on the ^ problem...
A PrivateBin more could be for /boot/grub/grub.cfg