I'm trying to make my player "Dash" but seems like it got stuck in place. pls help. Code below

Unity Engine
1 
 void Movement()    //For movementInput as Rigidbody
    {
        float MoveInputX = Input.GetAxisRaw("Horizontal");
        float MoveInputZ = Input.GetAxisRaw("Vertical");

        Vector3 MoveVelocity = new Vector3(MoveInputX, 0, MoveInputZ);
        MoveVelocity = MoveVelocity.normalized * moveSpeed * Time.deltaTime;
        rb.MovePosition(transform.position + MoveVelocity);
    }

    void Dashing()
    {
        if (Input.GetKeyDown(KeyCode.Space))
        {
            currentDashTime = 0.0f;
        }

        if (currentDashTime < maxDashTime)
        {
            moveDirection = new Vector3(0, 0, dashSpeed);
            currentDashTime += dashStopSpeed;
        }

        else
        {
            moveDirection = Vector3.zero;
        }

        rb.MovePosition(moveDirection * Time.deltaTime);
    }
2

What is dashstopspeed related to?
I think there must be a Time.deltatime somewhere with increasing currentDashTime