Determine when a character is stationary, and which direction they are facing

Question

I'm currently trying to figure out two things for my character's movement and animation.

1. A better/faster way to track when movement stops than the IsSleeping method.
2. A way to track which direction my character is facing to send this information to the animator.

Here is the code I'm currently using for movement and sending information to the animator:

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

public class KittenController2 : MonoBehaviour
{
    Rigidbody2D rb;
    Animator ani;

    public float speed;
    public float jumpForce;

    private float direction = 0f;

    void Start()
    {
        rb = GetComponent<Rigidbody2D>();
        ani = GetComponent<Animator>();
    }

    // Update is called once per frame
    void Update()
    {
        direction = Input.GetAxis("Horizontal");
        ani.SetBool("Stationary", rb.IsSleeping());
        
        if (direction > 0f)
        {
            rb.velocity = new Vector2(direction * speed, rb.velocity.y);
            ani.SetFloat("Move X", direction);
        }
        else if (direction < 0f)
        {
            rb.velocity = new Vector2(direction * speed, rb.velocity.y);
            ani.SetFloat("Move X", direction);
        }
        else
        {
            rb.velocity = new Vector2(0, rb.velocity.y);
        }

        if (Input.GetKeyDown(KeyCode.Space))
        {
            Jump();
        }
    }

    void FixedUpdate()
    {

    }

    void Jump()
    {
        rb.AddForce(new Vector2(0f, jumpForce), ForceMode2D.Impulse);
        ani.SetTrigger("Jump");
    }
}

Answer 1

Thanks for the input from everyone here. I managed to find a good solution to this that updates almost instantly.

Before any of the functions:

public float stationaryThreshold;
private float squaredStationaryThreshold;

Inside functions:

void Awake()
    {
        squaredStationaryThreshold = stationaryThreshold * stationaryThreshold;
    }

void Update()
    {
        ani.SetBool("Stationary", rb.velocity.sqrMagnitude <= squaredStationaryThreshold);
    }

This checks whether the square root of the movement velocity's magnitude is less than or equal to the square root of whatever the stationary threshold is set to.

I then have this communicating with the animator to achieve my goal, changing the animation from moving to idle as soon as the character stops moving.