I generated my first test project with TouchGfx. It compiles correctly but I don't see any images on the display. Maybe it does added some code to display the first screen?

[MM..1]

Your code is empty off display init. TGFX is memory gui manager , hw is on your code.

LTDC init seems good, but need minimum call in user part unreset display pin and turn on backlight.

Create some example on TGFX and read BSP codes.