Hoping someone can help me out with a UEFI boot issue using SMOS.

I've created a SMOS usb drive using etcher.  But my motherboard defaults to UEFI mode when I enable 4G decoding.  The SMOS usb drive I created will not boot under UEFI.  I'm trying to find out how to create a UEFI bootable SMOS usb drive.  Any help would be great, thanks!