Comment # 4 on bug 1182957 from Dr. Werner Fink

I've have shrink /boot round about 1MB and inserted a clean partition with 1MB
size with the boot_grub flag.   Now I can run

  grub2-install -vvvv  /dev/nvme0n1

and indeed after enabling the SSD in BIOS it boot flawless ... now I've looked
into the YaST2 logs and found that it uses --force with grub2-install and does
not check the warning nor error messages from grub2-install to warn the user.

This NVME SSD M2 disk was a replacment for a broken non-NVME SSD M2, that is I
had done this in the rescue mode without knowing about the need of having a
small boot_grub partition for the (standard) GPT. Otherwise I had choosen
MBR/DOS.

Feel free to reasign this to the YaST team