Is USB power on an option ROM?

I have no clue how most things works so i want to ask here.
My mid-price Asus z370 has no USB mouse or keyboard power on in the UEFI settings but pressing any key in off mode lights the NUM LED.
Is it possible there is simply an option ROM needed they only offer for high-price models?

There is no Option ROM module available for USB power.

Thank you Fernando. It may be impossible to add this option afterwards but if someone knows how please give a hint.