I use ESP32S3, but my LCD is 480*320. When I want to use ESP-IDF to export, the available boards do not have matching options. How can I build my own board to use?
Yes, you can create your own custom board-template if none of them fits your board’s resolution/driver/etc. This question has been asked many times at the forum so I’d suggest to search for the words ‘board template’ here at the forum. But in the essence of this is documented here: Open Board Platform (OBP) | SquareLine Studio
(You can set the resolution in the ‘.slb’ file.)