adding this Code worked for me.

private void Start()
{
    // Store the initial rotation
    initialRotation = transform.rotation;
    
    // Get the NavMeshAgent component
    navMeshAgent = GetComponent<NavMeshAgent>();
}

private void Update()
{
    if (navMeshAgent.velocity != Vector3.zero)
    {
        // Apply the initial rotation
        transform.rotation = initialRotation;
    }
}

Adding this Code worked for me.

private void Start()
{
    // Store the initial rotation
    initialRotation = transform.rotation;
    
    // Get the NavMeshAgent component
    navMeshAgent = GetComponent<NavMeshAgent>();
}

private void Update()
{
    if (navMeshAgent.velocity != Vector3.zero)
    {
        // Apply the initial rotation
        transform.rotation = initialRotation;
    }
}