With TFT_eSPI, I put a build_opt.h in the sketch folder with the following contents. This makes it more portable (and versionable). You need the USE_HSPI_PORT macro. I then put analogWrite(TFT_BL, TFT_BL_LEVEL); in setup() after init'ing the device. https://wokwi.com/projects/436838160182099969 ...

which file in Arduino\libraries\TFT_eSPIUser_Setups did you edit?
with the ESP32-S3-DevKitC-1 and Waveshare General 2inch LCD Display Module IPS Screen 240×320 ST7789
I used Documents\Arduino\libraries\TFT_eSPIUser_Setups/Setup71_ESP32_S2_ST7789.h
and setup Documents\Arduino\libraries\TFT_eSPI ...

Using Arduino IDE version 2.3.6
DevKit: ESP32-S3-USB-OTG
Board: ESP32 S3 MINI 1
Screen: ST7789
Library: TFT_eSPI 2.5.43
user_setup.h:
#define ST7789_DRIVER

#define TFT_RGB_ORDER TFT_BGR

#define TFT_WIDTH 240
#define TFT_HEIGHT 240

#define TFT_MOSI 7
#define TFT_SCLK 6
#define TFT_CS 5
#define TFT ...