So do those "efibootmgr-manual" entries work? As for the strange boot entry in comment#5, do you even install openSUSE in HDD? If so, would you mind to mount sda1 and see if there is boot/fallback.efi? Also please check if opensuse/boot.csv exists. I wonder if the boot entry was created by fallback.efi instead of efibootmgr.