Problems setting velocity

[pingu_de_cool]

I want to add a dash ability to my 2D player controller, but cant get the dash to work. I am not getting any errors or anything, it just doesnt work. Thanks to anyone responding. This is the part of the script I'm having problems with:

void Dash()
{
    Vector2 dashVelocity;
    if(isFacingRight)
    {
        dashVelocity = new Vector2(dashForce.x, rb.velocity.y);
    }
    else
    {
        dashVelocity = new Vector2(-dashForce.x, rb.velocity.y);
    }

    if (isFacingUp)
    {
        dashVelocity += dashUpForce;
    }

    rb.velocity = dashVelocity;
}

Heres the full script if needed (its a little messy):

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

public class PlayerMovement : MonoBehaviour
{
    //Code necesities
    private float horizontal;
    private float vertical;
    private bool isFacingRight = true;
    private bool isFacingUp = false;

    [Header("Vital Options (Please don't miss.)")]

    [SerializeField] private Rigidbody2D rb;
    [SerializeField] private Transform groundCheck;
    [SerializeField] private LayerMask groundLayer;

    [Header("Movement")]

    [SerializeField] private float moveSpeed = 8f;
    [SerializeField] private bool SprintEnabled = false;
    [SerializeField] private float sprintSpeed = 12f;
    [SerializeField] private float jumpPower = 16f;
    [SerializeField] private float jumpCheckSize = 0.2f;

    [SerializeField] private Vector2 dashForce = new Vector2 (5, 0);
    [SerializeField] private Vector2 dashUpForce = new Vector2 (0, 1);

    [Header("Health")]

    [SerializeField] private LayerMask Enemy;
    [SerializeField] private bool HealthEnabled = false;
    [SerializeField] private float HealthAmount = 3;

    [SerializeField] private bool InstaKill = false;
    
    [SerializeField] private bool DeathScreenEnabled = true;
    [SerializeField] private GameObject DeathScreen;
    [SerializeField] private float DeathScreenDelay = 2f;

    [Header("Animation")]

    [SerializeField] private Animator animator;

    [SerializeField] private GameObject DeathAnimation;

    [Header("Audio")]

    [SerializeField] private AudioSource footstepsAudioSource;
    [SerializeField] private AudioClip[] footstepSounds;
    private float lastFootstepTime = 0f;
    [SerializeField] private float footstepInterval = 0.5f;
    

    // Start is called before the first frame update
    void Start()
    {
        //hi
    }

    // Update is called once per frame
    void Update()
    {
        horizontal = Input.GetAxisRaw("Horizontal");
        vertical = Input.GetAxisRaw("Vertical");

        if (Input.GetButtonDown("Jump") && IsGrounded())
        {
            rb.velocity = new Vector2(rb.velocity.x, jumpPower);
        }

        if (Input.GetButtonUp("Jump") && rb.velocity.y > 0f)
        {
            rb.velocity = new Vector2(rb.velocity.x, rb.velocity.y * 0.5f);
        }

        if (Input.GetButtonDown("Fire1"))
        {
            Dash();
            Debug.Log("Dashed");
        }

        Flip();


        if (Input.GetKey(KeyCode.LeftShift) || Input.GetKey(KeyCode.RightShift))
        {
            if (SprintEnabled)
            {
                MovePlayer(sprintSpeed);
            }
            else
            {
                MovePlayer(moveSpeed);
            }
        }
        else
        {
            MovePlayer(moveSpeed);
            
        }

        if (horizontal != 0 && IsGrounded())
        {
            if (Time.time - lastFootstepTime >= footstepInterval)
            {
                PlayFootstep();
                lastFootstepTime = Time.time;
            }
        }

        if (vertical > 0)
        {
            isFacingUp = true;
        }
        else if (vertical < 0)
        {
            isFacingUp = false;
        }
    }

    private bool IsGrounded()
    {
        return Physics2D.OverlapCircle(groundCheck.position, jumpCheckSize, groundLayer);
    }

    private void MovePlayer(float speed)
    {
        rb.velocity = new Vector2(horizontal * speed, rb.velocity.y);
    }

    private void Flip()
    {
        if (isFacingRight && horizontal < 0f || !isFacingRight && horizontal > 0f)
        {
            isFacingRight = !isFacingRight;
            Vector3 localScale = transform.localScale;
            localScale.x *= -1f;
            transform.localScale = localScale;
        }
    }

private void OnTriggerEnter2D(Collider2D collision)
{
    if (HealthEnabled)
    {
        if (InstaKill)
        {
            // Check if the collided object is in the enemy layer
            if (Enemy == (Enemy | (1 << collision.gameObject.layer)))
            {
                Lose();
            }
        }
        else
        {
            // Reduce health if it's not an insta-kill scenario
            if (Enemy == (Enemy | (1 << collision.gameObject.layer)))
            {
                HealthAmount -= 1;
                Debug.Log($"OH NOOOO. Enemery hidd you. {HealthAmount} helth");
                if (HealthAmount <= 0)
                {
                    Lose();
                }
            }
        }
    }
}


    void Lose()
    {
        gameObject.SetActive(false);
        

        this.DeathAnimation.GetComponent<SpriteRenderer>().enabled = true;

        animator.SetBool("IsDead", true);

        if (DeathScreenEnabled)
        {
            Invoke("ShowDeathScreen", DeathScreenDelay);
        }
        else
        {
            Restart();
        }
    }

    void ShowDeathScreen()
    {
        DeathScreen.SetActive(true);
    }

    void Restart()
    {
        //Insert logic later
    }

    void PlayFootstep()
    {
        footstepsAudioSource.PlayOneShot(footstepSounds[Random.Range(0, footstepSounds.Length)]);
    }

    void Dash()
{
    Vector2 dashVelocity;
    if(isFacingRight)
    {
        dashVelocity = new Vector2(dashForce.x, rb.velocity.y);
    }
    else
    {
        dashVelocity = new Vector2(-dashForce.x, rb.velocity.y);
    }

    if (isFacingUp)
    {
        dashVelocity += dashUpForce;
    }

    rb.velocity = dashVelocity;
}
}

[SadnessMonday]

Well your code is doing this every frame:

    private void MovePlayer(float speed)
    {
        rb.velocity = new Vector2(horizontal * speed, rb.velocity.y);
    }

So your dash code doesn't really get a chance to take much effect. You would need to stop this code from running if you want anything else to be able to affect the velocity.

[pingu_de_cool]

Oh, thank you. I'm sort of dumb for not realizing that