Hi I have same board and need help with disabling secure boot/csm on it. I can not find any option like this in my bios, are you able to help me somehow?
Link to BIOS, I can enable those settings to be visible for you
I checked -M-LE/CSM model BIOS and they are there, so probably also there for your model.
Sorry, those options are missing from your BIOS, not hidden.