That’s normal. On BIOS systems the stage 1 bootloader (which is what this command installs) is always i386, see https://wiki.archlinux.org/title/GRUB#Installation_2 .
What surprises me is that the installer runs in BIOS mode, because your system should be recent enough to use EFI. When you boot into the installer, you should make sure to select the boot entry that has EFI in its name. That might be the problem, but without seeing the output of grub-install, it’s hard to tell.
Yeah, when you grow your hair out there is this awkward phase where it isn’t long enough to tie it back. You can wear a sweatband, that will keep them out of your face at least. But even when they’re longer, they’ll still annoy you sometimes. When it’s windy, you constantly get hair in your mouth and face. That’s why I always have a hair tie on me.