Why are the 2D colliders not working?

I created a 2D Tilemap with forest and attached a tilemap collider to the trees. Nevertheless the rigidbody with a capsule collider runs straight over the trees. The only code I used is the following to make the player move:

 using UnityEngine;
 using System.Collections;
 
 public class PlayerMovement : MonoBehaviour
 {
 
     Direction currentDir;
     Vector2 input;
     bool isMoving = false;
     Vector3 startPos;
     Vector3 endPos;
     float t;
 
     public Sprite northSprite;
     public Sprite eastSprite;
     public Sprite southSprite;
     public Sprite westSprite;
 
     public float walkSpeed = 3f;
 
     public bool isAllowedToMove = true;
 
     void Start()
     {
         isAllowedToMove = true;
     }
 
     void Update()
     {
 
         if (!isMoving && isAllowedToMove)
         {
             input = new Vector2(Input.GetAxis("Horizontal"), Input.GetAxis("Vertical"));
             if (Mathf.Abs(input.x) > Mathf.Abs(input.y))
                 input.y = 0;
             else
                 input.x = 0;
 
             if (input != Vector2.zero)
             {
 
                 if (input.x < 0)
                 {
                     currentDir = Direction.West;
                 }
                 if (input.x > 0)
                 {
                     currentDir = Direction.East;
                 }
                 if (input.y < 0)
                 {
                     currentDir = Direction.South;
                 }
                 if (input.y > 0)
                 {
                     currentDir = Direction.North;
                 }
 
                 switch (currentDir)
                 {
                     case Direction.North:
                         gameObject.GetComponent<SpriteRenderer>().sprite = northSprite;
                         break;
                     case Direction.East:
                         gameObject.GetComponent<SpriteRenderer>().sprite = eastSprite;
                         break;
                     case Direction.South:
                         gameObject.GetComponent<SpriteRenderer>().sprite = southSprite;
                         break;
                     case Direction.West:
                         gameObject.GetComponent<SpriteRenderer>().sprite = westSprite;
                         break;
                 }
 
                 StartCoroutine(Move(transform));
             }
 
         }
 
     }
 
     public IEnumerator Move(Transform entity)
     {
         isMoving = true;
         startPos = entity.position;
         t = 0;
 
         endPos = new Vector3(startPos.x + System.Math.Sign(input.x), startPos.y + System.Math.Sign(input.y), startPos.z);
 
         while (t < 1f)
         {
             t += Time.deltaTime * walkSpeed;
             entity.position = Vector3.Lerp(startPos, endPos, t);
             yield return null;
         }
 
         isMoving = false;
         yield return 0;
     }
 }
 
 enum Direction
 {
     North,
     East,
     South,
     West
 }

,I created a Tilemap and attached the tilemap collider 2D to the forest. Nevertheless the Rigidbody with a Capsule Collider runs straight over the trees. The only code I have is the following to move my charakters. Why arent the colliders working properly?

 using UnityEngine;
 using System.Collections;
 
 public class PlayerMovement : MonoBehaviour
 {
 
     Direction currentDir;
     Vector2 input;
     bool isMoving = false;
     Vector3 startPos;
     Vector3 endPos;
     float t;
 
     public Sprite northSprite;
     public Sprite eastSprite;
     public Sprite southSprite;
     public Sprite westSprite;
 
     public float walkSpeed = 3f;
 
     public bool isAllowedToMove = true;
 
     void Start()
     {
         isAllowedToMove = true;
     }
 
     void Update()
     {
 
         if (!isMoving && isAllowedToMove)
         {
             input = new Vector2(Input.GetAxis("Horizontal"), Input.GetAxis("Vertical"));
             if (Mathf.Abs(input.x) > Mathf.Abs(input.y))
                 input.y = 0;
             else
                 input.x = 0;
 
             if (input != Vector2.zero)
             {
 
                 if (input.x < 0)
                 {
                     currentDir = Direction.West;
                 }
                 if (input.x > 0)
                 {
                     currentDir = Direction.East;
                 }
                 if (input.y < 0)
                 {
                     currentDir = Direction.South;
                 }
                 if (input.y > 0)
                 {
                     currentDir = Direction.North;
                 }
 
                 switch (currentDir)
                 {
                     case Direction.North:
                         gameObject.GetComponent<SpriteRenderer>().sprite = northSprite;
                         break;
                     case Direction.East:
                         gameObject.GetComponent<SpriteRenderer>().sprite = eastSprite;
                         break;
                     case Direction.South:
                         gameObject.GetComponent<SpriteRenderer>().sprite = southSprite;
                         break;
                     case Direction.West:
                         gameObject.GetComponent<SpriteRenderer>().sprite = westSprite;
                         break;
                 }
 
                 StartCoroutine(Move(transform));
             }
 
         }
 
     }
 
     public IEnumerator Move(Transform entity)
     {
         isMoving = true;
         startPos = entity.position;
         t = 0;
 
         endPos = new Vector3(startPos.x + System.Math.Sign(input.x), startPos.y + System.Math.Sign(input.y), startPos.z);
 
         while (t < 1f)
         {
             t += Time.deltaTime * walkSpeed;
             entity.position = Vector3.Lerp(startPos, endPos, t);
             yield return null;
         }
 
         isMoving = false;
         yield return 0;
     }
 }
 
 enum Direction
 {
     North,
     East,
     South,
     West
 }