KC868-A8 and PCF8574 Interrupt pin

[PMGO]

KC868-A8 have two chips of PCF8574
PCF8574-Digital input:  have interrupt pin with ESP32's GPIO16
PCF8574-Digital output: not use the interrupt pin.

Hi everyone !
I am planning the exact same thing (use interrupt pin of PCF8574) but my board is KC868-A8S-V1.2 . In my schematic it looks like it is connected to GPIO16 too, but in the "KC868-A8S ESP32 I/O pin define" GPIO16 is connected to RF433MHz wireless receiver.
In my board, the PCF8574 interrupt pin is connected? If not, what can I do?