With this guide, you have all the knowledge to master simulation. Happy coding!

: In Proteus, the default I2C address for the PCF8574 driver is often Hardware Address : On real physical hardware, the address is typically Wiring Guide

If you need a simulator for I2C LCD, consider:

void loop() // Nothing here

Using a JHD2X16I2C LCD in Proteus: A Complete Free Simulation Guide