PlayableDirectorSpeedController

public class PlayableDirectorPlaybackSpeed : MonoBehaviour
{
    [SerializeField] private PlayableDirector _playableDirector;
    [SerializeField] float _playbackSpeed = 1f;

    void Update()
    {
        if (_playableDirector && _playableDirector.playableGraph.IsValid())
        {
            Playable playable = _playableDirector.playableGraph.GetRootPlayable(0);
            playable.SetSpeed(_playbackSpeed);
        }
    }
}