https://aur.archlinux.org/packages/grub-hook
So I found this, sounds better than reading update outputs. I survived two years without reading outputs, if we don’t count the grub issues.
edit: the above link is for kernel updates, so not good
I found this, looks like what I need Grub Hook to grub-install and grub-mkconfig?
Someone said you can even uninstall the package, and stay with the installed version. I did something similar, I just put it in ignorePkg a few months ago.