[BUG] T420 only shows efi shell on booting off of the usb

[Wyind]

Describe the bug
Says in the title, when booting from the usb, it only shows the efi shell and nothing else relating to open core

Screenshots
If applicable, add screenshots to help explain your problem.

Device (please complete the following information):

• macOS Version: 13
• EFI Version: 83ET70WW (1.40)
• EFI type (regular or HeliPort): Regular

Additional context
Add any other context about the problem here.

[Mechanikerlegion511]

I do everything exactly according to the instructions after rebooting the USB flash drive I have only one shell and everything please tell me where to pay attention