You have one of two possibilities with the TPS65982:
1) The internal power switch is controlling the 5V power.
2) It is driving external NMOS via HV_GATE1 and HV_GATE2 pins.
I can not see in your picture whether there are traces leaving HV_GATE2 on the top layer (it is on the edge of the IC so this is possible). If so, you can follow this trace to the power switch. If a trace leaves SENSN you can follow it to the sense resistor which will allow you to find the power path. If there is an external power switch, you should watch the gate when you connect a device, the gate should be driven somewhere between 4.5V and 7.5V only when a device is attached. The power switch (whether internal or external) will not activate until attach is detected on the CC pins.
The ESD protection level of the TPS65982 is rather poor and it would be assumed that there is external protection for the CC pins; It would be worth checking to see if the CC pins are behaving normally - See USB Type C specification from USBIF.org for an explanation of how these pins work.