Alright I played around a bit and found that I can change it. So I could just fine tune the falues by myself.
The only problem thats I have now is that I do Serial.println(p.x);
and I swipe up and down on the touchscreen and it reads the y values.
So I need to swap X and Y coordinate.
I tried this already:
p.y = map(p.x, TS_TOP, TS_BOT, 0, display.height());
p.x = map(p.y, TS_LEFT, TS_RIGHT, 0, display.width());
I swapped p.y and p.x at the beginning of the line. Didnt help. I also tried to swap display.height() and display.widht() with no success