Efi boot disappeared.

[Kenshin Himura]

So, I made a USB with freedos to try once again and update my bios. Went to bios settings and change the boot mode into legacy in order to boot up from USB. When I tried to boot up into USB an error occurred. Then I went back into BIOS change the settings as it was before and now the nvme doesn't appear at all... And I can't boot into system. Anyone knows what's going on?