What's is wrong with my ui.c File. I can't use LV_LOG_USER to see "Clicked" in console or terminal

I have this code:

Based on this:

#include "../../lv_examples.h"

static void event_handler(lv_event_t * e)
    lv_event_code_t code = lv_event_get_code(e);

    if(code == LV_EVENT_CLICKED) {
    else if(code == LV_EVENT_VALUE_CHANGED) {

void lv_example_btn_1(void)
    lv_obj_t * label;

    lv_obj_t * btn1 = lv_btn_create(lv_scr_act());
    lv_obj_add_event_cb(btn1, event_handler, LV_EVENT_ALL, NULL);
    lv_obj_align(btn1, LV_ALIGN_CENTER, 0, -40);

    label = lv_label_create(btn1);
    lv_label_set_text(label, "Button");

    lv_obj_t * btn2 = lv_btn_create(lv_scr_act());
    lv_obj_add_event_cb(btn2, event_handler, LV_EVENT_ALL, NULL);
    lv_obj_align(btn2, LV_ALIGN_CENTER, 0, 40);
    lv_obj_add_flag(btn2, LV_OBJ_FLAG_CHECKABLE);
    lv_obj_set_height(btn2, LV_SIZE_CONTENT);

    label = lv_label_create(btn2);
    lv_label_set_text(label, "Toggle");

It’s compiling Ok but I can’t see Clicked anywhere
Note: I stay using RT-THREAD IDE

How to solve

Did you enable user log? Logging — LVGL documentation

I was just now learning to create my events and functions directly in SLS. I need your help to integrate code from arduino_main.cpp and main.c from rt-thread studio with ui.c functions to trigger the smd object (in arduino_main.cpp file) for me to spin motors: