The library is not yet confirmed to work for AD8402 (2 channels). This device has a very similar interface (datasheet comparison) so it should work. If you can ...
b) Esp32_S3_DevBoard_SSD1306_Potentiometer_v02: The sketch is working with the onboard Trimpot Trimmer Potentiometer and displays the measured value from the "Analog Digital Converter ("ADC") that ...