The default gesture controls of this product cannot activate the voice assistant. You can enter the Nothing X App, select the left ear or right ear in the control settings, and set the tap/long press or double tap and hold gesture to activate the voice assistant. Once the settings are completed, you can activate the voice assistant through the corresponding gesture.
For more information about operational functions, you can download the Nothing X App, which is available for search and download in the Google Play Store and the Apple App Store.