Failed to backup SSD EFI into USB EFI

I'm able to boot into my monterey hackintosh using bootloader installed on my ssd EFI, but now i'm trying to backup my SSD's EFI into an USB Flash Drive.

I formatted my USB using disk utility with MacOS Extended Journaled and GUID partition scheme, then i mount and created EFI folder inside EFI partitions, then i copy my SSD EFI into USB EFI folder.

But, when i'm trying to boot using USB it only showed black screen after opencore menu.

Thank you in advance