wdym? I attached the link to chroot right there in my previous post. To chroot into your device you need a bootable USB with garuda on it. Once you have booted into the live ISO you can either
a. Use the boot repair option in garuda welcome to reinstall grub, or if you have trouble using this GUI utility
b. Follow this link - How to chroot Garuda Linux (also added in my previous post) to manually chroot into your device and reinstall grub.