IO_EXPANDER_PIN_NUM_0 = (1ULL << 0), IO_EXPANDER_PIN_NUM_1 = (1ULL << 1), IO_EXPANDER_PIN_NUM_2 = (1ULL << 2), IO_EXPANDER_PIN_NUM_3 = (1ULL << 3), IO_EXPANDER_PIN ...

As the ESPuno Pi Zero also has a PCA9671 on default address 0x20, ensure you set the PGEZ I2C address away from the 0x20. Then update the below PCA_Address. See Wiki ...