Map/Scene Truly Loaded Detector C# Unity

Example.cs

//EXAMPLE USAGE:
void OnEnable()
{
    if (MapLoadDetector.Instance != null)
        MapLoadDetector.Instance.onMap1LoadedCall += OnMapLoaded;
}

void OnDisable()
{
    if (MapLoadDetector.Instance != null)
        MapLoadDetector.Instance.onMap1LoadedCall -= OnMapLoaded;
}

void OnMapLoaded()
{
    Debug.Log("Map 1 completely loaded.");
}

MapLoadDetector.cs

//Made by: HolyFot
//License: CC0 - https://creativecommons.org/share-your-work/public-domain/cc0/
//Note: Attach this script to an object in your first scene
//Note: This script was created since SceneManager.sceneLoaded delegate triggers way too early when loading scenes/maps
using UnityEngine;
using System;
using System.Collections;
using UnityEngine.SceneManagement;
using UnityEngine.Events;

public class MapLoadDetector : MonoBehaviour
{
    //Settings
    public string map1Scene = "CR_Map1";
    public string map2Scene = "CR_Map2";

    public delegate void EventMapLoad();
    public event EventMapLoad onMap1LoadedCall;

    //Info
    public bool isMapLoaded1;
    public bool isEnabled = false;

    //Internal
    private float fpsTimer = 1.0f;
    private float currTimer;
    private int fpsCount = 0;
    private int currentFPS = 0;
    private static MapLoadDetector _Instance;
    private bool alreadyTriggered1 = false;

    public static MapLoadDetector Instance
    {
        get
        {
            if (_Instance == null)
                _Instance = GameObject.FindObjectOfType<MapLoadDetector>();
            return _Instance;
        }
    }

    void Awake()
    {
        DontDestroyOnLoad(this.gameObject);
        currTimer = 1f;
        isEnabled = true;
    }

    void OnEnable()
    {
        isEnabled = true;
        alreadyTriggered1 = false;
        StartCoroutine("FPSCalc");
        currTimer = 1f;
    }

    void OnDisable()
    {
        isEnabled = false;
        alreadyTriggered1 = false;
        StopCoroutine("FPSCalc");
    }

    void Update()
    {
        currTimer -= Time.deltaTime;
        if (currTimer <= 0.0f) //1 Second
        {
            //Calculate Accurate FPS & Reset
            currentFPS = fpsCount;
            fpsCount = 0;

            if (SceneManager.GetActiveScene().name == map1Scene || SceneManager.GetActiveScene().name == map2Scene)
            {
                if (currentFPS > 10 && !alreadyTriggered1) //Over 10fps & Map is loaded
                {
                    if (onMap1LoadedCall != null)
                    {
                        onMap1LoadedCall.Invoke();
                    }
                    isMapLoaded1 = true;
                    alreadyTriggered1 = true;
                }
                else
                    isMapLoaded1 = false;
            }
            else
                isMapLoaded1 = false;

            currTimer = fpsTimer; //Reset Timer
        }
    }

    IEnumerator FPSCalc()
    {
        while (isEnabled)
        {
            yield return 0; //Count Each Frame
            fpsCount++;
        }
    }
}