Run in the Arduino IDE the HelloWorld example with an ili9488 in SPI. In fact, you don't need an ili display to try this, because it fails at compile time. The possible wiring errors, are irrelevant ...

SPI - Serial Peripheral Interface (SPI), sometimes called a 4-wire interface, is a serial synchronous data transfer interface. Unlike I2C and UART, SPI requires more signals to operate but can operate ...