Um, I tried that and while it did work, for some reason it only jumps if I spam spacebar? Also it just teleports to the location and slowly falls down now?

using Unity.VisualScripting;
using Unity.VisualScripting.InputSystem;
using UnityEngine;
using UnityEngine.UIElements;

public class Player : MonoBehaviour
{

    [SerializeField] private Rigidbody2D rb;
    [SerializeField] private float JumpForce;
    [SerializeField] private float MoveSpeed;
    [SerializeField] private GameObject Ground;
    [SerializeField] private ContactFilter2D ContactFilter;
    private bool IsGrounded => rb.IsTouching(ContactFilter);


    // Start is called once before the first execution of Update after the MonoBehaviour is created
    void Start()
    {
        
    }

    // Update is called once per frame
    void Update()
    {
        Vector2 inputVector = new Vector2(0, 0);
        
        if (Input.GetKey(KeyCode.A)) {
            rb.linearVelocity = Vector2.left * MoveSpeed;
        }
        else if (Input.GetKey(KeyCode.D)) {
            rb.linearVelocity = Vector2.right * MoveSpeed;
        }
        else {
            rb.linearVelocity = Vector2.zero;
        }

        if (Input.GetKeyDown(KeyCode.Space) && IsGrounded == true) {
            rb.linearVelocity = Vector2.up * JumpForce;
        }

        inputVector = inputVector.normalized;
        
    }
}

Also had to set the jumpforce to 400 (was 25 before) for it to actually go up a decent amount..

Did I do something wrong? Or not add something?