JourneyToNowhere_Unity/Assets/Scripts/SingleUtils/AdvLevelMan.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using TMPro;
using UnityEngine.SceneManagement;

public class AdvLevelMan : MonoBehaviour
{
    public Slider loadingBar;
    public TMP_Text loadingText;

    public void SwitchSceneAdv(string levelName)
    {
        StartCoroutine(LoadSceneAsync(levelName));
    }

    IEnumerator LoadSceneAsync(string levelName)
    {
        Debug.Log($"Loading scene {levelName}");
        AsyncOperation op = SceneManager.LoadSceneAsync(levelName);
        while (!op.isDone)
        {
            float progress = Mathf.Clamp01(op.progress / .9f);
            //Debug.Log(op.progress);
            loadingBar.value = progress;
            loadingText.text = $"<align=center>{(progress * 100f).ToString("0.00")}%";
            if ((progress * 100f) >= 98)
                loadingText.text = "Starting your journey...";
            yield return null;
        }
    }
}