Edk2 boot from sd

I have the problem that after installing https://github.com/edk2-porting/edk2-rk3588/releases/download/v0.11.2/rock-5b_UEFI_Release_v0.11.2.img
the sd card does not start.
Need it to start opensuse from usb disk.
Any idea ?
regards
Uli