Is this why my grub disappeared? I didnt pay attention on my gaming pc and then a few weeks later I noticed when I wanted to boot into linux. Fucking windows.
Check your boot order in uefi, if grub is not in there, it's evivars got deleted by a bios update, which can happen in windows depending on your motherboard vendor.
Some live usbs (I know manjaro's does) present you the option to boot from disk, so you can get into your system without chrooting and reinstall grub + evivars.