The ILI9341 display 2.8" TFT Doesn't communicate with my Arduino Uno R4

Other Hardware Displays
1

With this code I just have a white screen. Everything works with my Uno R3

#include <SPI.h>
#include <Adafruit_GFX.h>
#include <Adafruit_ILI9341.h>

// Pin-Zuweisungen (anpassen, falls nötig)
#define TFT_CS   10
#define TFT_DC   9
#define TFT_RST  8

Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_RST);

void setup() {
  Serial.begin(115200);
  Serial.println("Display Test");

  tft.begin();
  tft.setRotation(1);
  tft.fillScreen(ILI9341_BLACK);
  tft.setTextColor(ILI9341_WHITE);
  tft.setTextSize(2);
  tft.setCursor(10, 10);
  tft.println("Hello, Display!");
}

void loop() {
  // Nichts zu tun
}
2

If you have J3 in place and it does not work post an annotated schematic showing exactly how you have wired it.

This link may help: https://simple-circuit.com/interfacing-arduino-ili9341-tft-display/