I'd like to get a pcb made for an Arduino Nano project I've designed. It uses an Arduino Nano V3.0 ATmega328P together with an LCD 2004 I2C and an RTC DS3231 I2C module.

I've been going round in circles trying to find those parts in the LCSC parts catalog so I could add them to a schematic in preparation for the pcb work. So maybe I'm going about this in the wrong way?