The LilyGO T-Display board is not shown in the boards list. It is an ESP32 Dev Module.
The T-Display has i2c on pins 21 and 22, so in the Arduino IDE you need to initialize the Wire library with "Wire.begin(21,22);".
To use the TFT_eSPI library needs a little config for the T-Display. The User_Setup.h need to be edited as below.
#define ST7789_DRIVER // IPS 1.14 in T-Display #define TFT_WIDTH 135 #define TFT_HEIGHT 240 #define TFT_MOSI 19 #define TFT_SCLK 18 #define TFT_CS 5 #define TFT_DC 16 #define TFT_RST 23 #define TFT_BL 4