Switch these out in the code though for better results and manually start the SPI
Adafruit_ST7789 tft = Adafruit_ST7789(TFT_CS, TFT_DC, TFT_MOSI, TFT_SCLK, TFT_RST);
//Replace that with this
Adafruit_ST7789 tft = Adafruit_ST7789(&SPI, TFT_CS, TFT_DC, TFT_RST);
// put in setup
SPI.begin(TFT_SCLK, TFT_RST, TFT_MOSI, TFT_CS);
tft.init(240, 280);