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 ...

This example code is in the public domain. AVR-Based Serial Enabled LCDs Hookup Guide https://learn.sparkfun.com/tutorials/avr-based-serial-enabled-lcds-hookup-guide ...