Variable Jump Height Isn't working

I’m trying a new Unity project and i recently updated to Unity6 and I’m trying to add variable jump height to my character. I have used this code for projects in the past and it has worked but now it just does a normal jump and doesn’t have the variable jump height effect.

here is my code:

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

public class PlayerControl : MonoBehaviour
{
    [Header("Horizontal Movement Settings")]
    private Rigidbody2D rb;
    [SerializeField] private float walkSpeed = 1f;
    private float xAxis;

    [Header("Ground Check Settings")]
    [SerializeField] private float jumpHeight = 45f;
    [SerializeField] private Transform groundCheckPoint;
    [SerializeField] private float groundCheckY = 0.2f;
    [SerializeField] private float groundCheckx = 0.5f;
    [SerializeField] private LayerMask whatIsGround;

    // Start is called before the first frame update
    void Start()
    {
        rb = GetComponent<Rigidbody2D>();
    }

    // Update is called once per frame
    void Update()
    {
        GetInputs();
        Move();
        Jump();
    }

    void GetInputs()
    {
        xAxis = Input.GetAxisRaw("Horizontal");
    }

    private void Move()
    {
        rb.linearVelocity = new Vector2(walkSpeed * xAxis, rb.linearVelocity.y);
    }

    public bool Grounded()
    {
        if(Physics2D.Raycast(groundCheckPoint.position, Vector2.down, groundCheckY, whatIsGround) 
            || Physics2D.Raycast(groundCheckPoint.position + new Vector3(groundCheckx, 0, 0), Vector2.down, groundCheckY, whatIsGround)  
            || Physics2D.Raycast(groundCheckPoint.position + new Vector3(-groundCheckx, 0, 0), Vector2.down, groundCheckY, whatIsGround))
        {
            return true;
        }
        else
        {
            return false;
        }
    }

    void Jump()
    {
        if (Input.GetButtonDown("Jump") && rb.linearVelocity.y > 0)
        {
            rb.linearVelocity = new Vector2(rb.linearVelocity.x, 0);
        }

        if (Input.GetButtonDown("Jump") && Grounded())
        {
            rb.linearVelocity = new Vector3(rb.linearVelocity.x, jumpHeight);
        }
    }
}

to anyone else confused if figured it out. at line 59 you have to put a ! in front of Input.GetButtonDown(“Jump”) to make unity check if the button isn’t being pressed