How to reset the all pin values at initial state?

I would like to DIY a water dispenser machine,
the pin values may represent to the motor / valve status
When the device is disconnected from WiFi or no power.
After resuming power or WiFi, all pin values should return to initial default value, but not the latest stored value on Blynk cloud.

Is it able to do that?

Yes, but using exactly the same method that you would without Blynk, using a digitalWrite command for digital pins that have motors/valves connected to them.