After a while of not using openSUSE on my Windows/openSUSE dualboot setup, I came back and found something had broken on it, so I just decided to replace it with Manjaro.
After setup, in which I had reformatted the boot partition and installed Manjaro’s boot loader, I found that it was booting into another drive which I did not know had GRUB on it. Through the GRUB command line, I was able to get to the Manjaro GRUB and then into Manjaro, but for some reason my UEFI is not detecting the Manjaro boot partition.
I have followed the method on this thread, that adds Manjaro to the boot options used efibootmgr, but, while the correct option now shows up on efibootmgr, when I go into my UEFI settings, I don’t see that option and it won’t boot straight into it. I have turned secure boot off, and that doesn’t help, either.
Any help with this is appreciated and please let me know if any command outputs or logs are required.