New Siri remote Does not fast forward

Review this support document for more detailed instructions:

Control what’s playing on Apple TV - Apple TV user guide - Apple Support

↳ Rewind or fast-forward

↳ Scrub video backward or forward on the playback timeline

You can also use Siri to move forward or backward by saying a simple command such as "Move forward 5 minutes". Obviously one must turn on Siri and press the button on your remote with the microphone icon.