TriggerCounterTeleport.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class TriggerCounterTeleport : MonoBehaviour
{
    public Transform[] requiredAreasToVisit;
    public bool[] requiredAreasVisited;
    public Transform teleportPositionMarker;
    public Transform thingToTeleport;
    // Start is called before the first frame update
    void Start()
    {
        for (int i = 0;i < requiredAreasVisited.Length; i++){
          requiredAreasVisited[i] = false;
        }
    }

    // Update is called once per frame
    void Update()
    {
      int howManyVisited = 0;
        for (int i = 0; i < requiredAreasToVisit.Length; i++){
        if (requiredAreasVisited[i]){
          howManyVisited++;
        }
      }
      if (howManyVisited == requiredAreasToVisit.Length){
        thingToTeleport.position = teleportPositionMarker.position;
      }
    }

    void OnTriggerEnter(Collider col){
      for (int i = 0; i < requiredAreasToVisit.Length; i++){

        if (col.transform == requiredAreasToVisit[i])
          requiredAreasVisited[i] = true;

      }
    }
}