[Opensuse 1.5.5] New installation the efi opensuse directory is nearly empty and the system won't boot

Hi, I did a new installation using Leap 15.5, I have a dual-boot system with windows, I am using EFI without secure-boot. I had another linux distribution and I wanted to replace it with Leap. The installation process seemed to go well until I rebooted and I was greeted by the grub shell. mounting /boot/efi partition (which I did not format) I compared the opensuse directory with the old linux directory and there was a huge difference. In the opensuse directory there was on file GRUBX64.EFI and no grub.cfg, on the other hand the old linux efi directory was full of files. Why is this happening and how can I solve it? Regards.