No More “Hey Siri”
A notable change in both iOS 17 and watchOS 10 is that you don’t have to say “Hey Siri” to trigger Siri anymore.
Now, all you need to do is say “Siri,” and your Apple Watch will do the rest. You can still say “Hey Siri” if you prefer, and even turn off the shorter version in Settings > Siri if you find it comes up by mistake too often.