Connect multiple scenes to one main scene

@Shnuckles There you go... Unity doesn't allow to store Vector2 in PlayerPrefs so I'm using individual x and y float values to store the position as you said it is 2D game. Let me know if you encounter any issues

     public class PlayerLoadNewScene : MonoBehaviour
      {
          [SerializeField] private string sceneToLoad;
      
          private bool canLoadScene;
     
          public GameObject player;  // your Player or NPC whose position you want to set
          private float xPosition;   // Storing last known x and y position in this
          private float yPosition;
          private Vector2 playerPos;     // used for combining xPosition and yPosition into Vector2, just safe practice
         private float startXpos;    // Initial position when you load the World scene for the first time
          private float startYpos;
          
          private void Start()
          {
              xPosition = PlayerPrefs.GetFloat("X Position", startXpos);  // Gets xPosition if it stored, else will take startXPos for default
              yPosition = PlayerPrefs.GetFloat("Y Position", startYpos);
             playerPos = new Vector2(xPosition, yPosition);  // combining x and y into Vector2
             player.transform.position = playerPos;  // assigning player position
     
          }
          private void Update()
          {
              LoadNewScene();
          }
      
          private void LoadNewScene()
          {
              if (canLoadScene == true && Input.Get$$anonymous$$ey($$anonymous$$eyCode.Space))
              {
                  SceneManager.LoadSceneAsync(sceneToLoad);
              }
          } 
      
          private void OnTriggerEnter2D(Collider2D collision)
          {
             xPosition = player.transform.position.x;    // using same variable to store the new position before exiting the scene,
             yPosition = player.transform.position.y;    // however if you get issues than I would suggest you to create new variable for this.
             PlayerPrefs.SetFloat("X Position", xPosition);  // storing the player position values
             PlayerPrefs.SetFloat("Y Position", yPosition);
     
             canLoadScene = true;
          }
      }