homepods still require “Hey Siri” after OS 17 update

This worked! After upgrading iPhone to iOS 17.x go into Home on iPhone, in upper right choose gear wheel for Home Settings. Scroll down to Listen for..., tap that and you'll see that setting for Siri now offers listen for Siri, or listen for Hey Siri and Siri.

Finally!! Thank you, Apple!! Much needed update.

Check your HomePod Siri settings.

There is an option to turn on "Siri" or "Hey Siri" vs just "Hey Siri".

I had to turn it on for it to work after the update.

Same here, although in settings it’s choosen to respond to “hey Siri” or “Siri”