ADZS-SC584-EZLITE available GPIO


I would like to use two GPIO pins (one input and one output). I understand that for this purpose I should use Microchip GPIO expanders which are connected to the board's ICs, However, looking at the EVB schematic, it seems that there are only few unused pins on U47 and U48 and they are not connected to anywhere. 

Could you please suggest a solution or alternative?