I guess I’m trying to mount the wrong devices? my actual drive should be /dev/nvme0n1p1
Try unmounting all the already mounted partitions.
sudo su
umount -R -a
Now assuming the /dev/nvme0n1p1 and /dev/nvme0n1p2 are EnOS’ EFI and system partitions respectively:
mount /dev/nvme0n1p2 /mnt
mount /dev/nvme0n1p1 /mnt/boot/efi
arch-chroot /mnt
grub-install --target=x86_64-efi --efi-directory=/boot/efi --bootloader-id=EndeavourOS
grub-mkconfig -o /boot/grub/grub.cfg
Now typeexit to leave the chroot.
Check with efibootmgr -v to see if you now have a boot entry for EnOS in bios.
Hopefully, if you don’t hit the Secure Boot issue again, you will be able to boot into your EnOS system.
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Managed to get back in… damn this was scary.
Anything I can do to try and avoid further issues? everything started just because I tried to boot into tails… scared to try again but I have to
Great! 
I am not really sure what caused the issue at the outset. Apparently, something somehow had wiped the content of your EnOS’ /boot/efi and therefore rendering your EnOS unbootable. I don’t see how booting Tails could have done it.
Regarding the Secure Boot being renabled at every reboot, I don’t have other ideas than the CMOS battery issue. Usually when your settings in Bios wouldn’t remain as you have set them, it points to a failing battery. There might be other reasons as well. I hope others will chime in and give you some more insight into this.
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Thanks. It was also so weird that I tried to disable secure boot for days with no luck then it randomly worked… the wonder of machines
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I was off busy doing some stuff. So finally i see you got it to come up with a messed up grub once you got secure boot disabled. Thanks @pebcak for walking you through arch-chroot to reinstall grub. Hopefully now you won’t have an issue since originally you had this problem. My honest opinion is some of these manufacturers have a very poor implementation of UEFI. It’s just the basics and the Bios has limited functionality compared to what I’m used to on desktop boards. Anyway glad it’s working.
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definitely… this laptop was gifted from a Chinese friend and bought there. is there anything I can do to upgrade the BIOS/UEFI?
Yes… if there is a UEFI Bios update for it you could. You’d have to check the Huawei support site and find your exact model to see if there a newer update for it. Check also for the instructions it shows to update it. If you find the info you can send me the link and i’ll look at it.
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