use SWDIO and SWCLK as normal GPIO ?

I am trying to setup a PAS to use SWDIO and SWCLK on a Flipsky 75100 (5.03 branch). Is this something possible? or these pins are reserved only for reprogramminig? I believe I should be using:

#define HW_PAS1_PORT            GPIOA
#define HW_PAS1_PIN                15
#define HW_PAS2_PORT            GPIOB
#define HW_PAS2_PIN                3

right? what is the best way to debug it to make sure the signals are actually being read?

Thanks!