Reported about 1 year ago
In the new iOS 18 update, Apple has introduced the 'Voice Shortcuts' feature that allows users to wake up Siri digital assistant service using customized keywords through automatic voice recognition. Users can call up a variety of pre-set shortcuts and manual Siri control commands by setting up voice shortcuts in the 'Accessibility' section under 'Settings,' enabling them to customize Siri wake-up keywords and complete more complex tasks with Siri in the future. However, this feature is limited to iPhones and doesn't work with products like HomePod which still require using the 'Siri' keyword for activation.
Source: YAHOO