esp32-s3-super-mini.json
{
    "build": {
      "arduino": {
        "ldscript": "esp32s3_out.ld",
        "partitions": "default.csv"
      },
      "core": "esp32",
      "variant": "esp32s3",
      "mcu": "esp32s3",
      "f_cpu": "240000000L",
      "f_flash": "80000000L",
      "flash_mode": "qio",
      "extra_flags": [
        "-DARDUINO_ESP32S3_DEV",
        "-DARDUINO_USB_MODE=1",
        "-DARDUINO_RUNNING_CORE=1",
        "-DARDUINO_EVENT_RUNNING_CORE=1"
      ],
      "hwids": [
        ["0x303A", "0x1001"]
      ]
    },
    "connectivity": ["wifi"],
    "debug": {
      "default_tool": "esp-builtin",
      "onboard_tools": ["esp-builtin"],
      "openocd_target": "esp32s3.cfg"
    },
    "frameworks": ["arduino", "espidf"],
    "name": "Espressif ESP32-S3 Super Mini",
    "vendor": "Espressif",
    "url": "https://www.espboards.dev/esp32/esp32-s3-super-mini/",
    "upload": {
      "flash_size": "4MB",
      "maximum_size": 4194304,
      "maximum_ram_size": 327680,
      "require_upload_port": true,
      "speed": 460800
    }
  }


#include <Arduino.h>
#include <SPI.h>
#include <Adafruit_NeoPixel.h>
#include <TFT_eSPI.h>

// — LED setup —
#define LED_PIN    48
#define NUM_LEDS   1

SPIClass hspi(HSPI);
Adafruit_NeoPixel strip(NUM_LEDS, LED_PIN, NEO_GRB + NEO_KHZ800);
TFT_eSPI       tft  = TFT_eSPI();

uint16_t hue = 0;

void setup() {
  Serial.begin(115200);

  // start HSPI for TFT
  hspi.begin(TFT_SCLK, TFT_MISO, TFT_MOSI, TFT_CS);

  // init NeoPixel
  strip.begin();
  strip.show();

  // init TFT
  tft.init();
}

void loop() {
  // rainbow cycle
  strip.setPixelColor(0, strip.ColorHSV(hue * 256));
  strip.show();
  hue++;
  delay(20);
}




I included the flags from your platformio.ini file as below and it built correctly

[platformio]
boards_dir = boards

[env:esp32-s3-mini-1]
platform       = [email protected]
board          = esp32-s3-super-mini
framework      = arduino


; ------------------------
; MONITOR
; ------------------------
monitor_speed = 115200

; -----------------------
; FLASH / PARTITIONS
; ------------------------
board_build.flash_mode   = qio
board_build.flash_size   = 4MB
board_build.arduino.memory_type = qio_qspi


; ensure the TFT_eSPI library uses HSPI
build_flags    =
    -D USE_HSPI_PORT
; ------------------------
; WS2812 LED on GPIO48
; ------------------------
    -DLED_PIN=48
    -DNUM_LEDS=1
    -Os
    -DLED_OFF_BEAT=17
    -DUSER_SETUP_LOADED=1
    -DST7789_DRIVER=1
    -DCGRAM_OFFSET
    -DTFT_CS=10
    -DTFT_DC=6
    -DTFT_RST=-1
    -DTFT_MOSI=11
    -DTFT_SCLK=12
    -DTFT_MISO=13
    -DTFT_BL=-1
    -DTOUCH_CS=-1
    -DTFT_BACKLIGHT_ON=HIGH
    -DLOAD_GLCD=1
    -DLOAD_FONT2=1
    -DLOAD_FONT4=1
    -DLOAD_FONT6=1
    -DLOAD_FONT7=1
    -DLOAD_FONT8=1
    -DLOAD_GFXFF=1
    -DSMOOTH_FONT=1
    -DSPI_FREQUENCY=40000000

lib_deps       =
    ;bodmer/TFT_eSPI @ ^2.3.70
    https://github.com/Bodmer/TFT_eSPI.git
    https://github.com/adafruit/Adafruit_NeoPixel.git
    ;adafruit/Adafruit NeoPixel @ ^1.13.0