I checked the circuit in Tinkercad.
The address is 0x25, and I think that RS,RW,E,backlight,D4,D5,D6,D7 are according to the "LiquidCrystal I2C" library.
What we need is a working project in Tinkercad with a PCF8574 and a LCD display. But I could not find it. Maybe it does not work in Tinkercad.