I only use Siri with the original Homepods. It has always been terrible. You cannot even tell it to start playing movies on the TV that you have already purchased from Apple itself in the TV app. It will start to play some random song or something.
I should be able to say hey siri, start playing <name of media> on <name of Apple TV>, and it should be able to start the TV and start playing it.
If you have the magic phrase to make it work, I'd like to know. I tried for about five minutes while driving yesterday, to no avail.
For me, Siri is like an 80s text adventure game, except I was better at those.
Edit: just now I was able to call by interacting a second time with Siri, and using the physical button. Using the button never would have occurred to me while driving.
The perfectly obvious use cases Siri overlooks are maddeningly numerous. My go to example was "text this photo to <contact name>" For years I checked each new iOS release to see if that was enabled, and for close to ten years, no. I'm not sure whether it was the most recent, or the one before (I gave up somewhere along the way) but now you can (finally) do it.
I work around this by asking it to find Toyota in <my city>. Then if it finds the dealership, it asks if I want to navigate there, or call them.
I find the worst errors to be when I ask it for information, or to send a text, and it instead places a phone call to someone. It will even call people that I have never called on my phone (a fact it should know), without asking first.
Siri: I'm sorry, that contact is not in your list
Me: Siri, what is the number for <my city> Toyota.
Siri: <my city> Toyota's phone number is 123-456-7890 [said too fast to remember or write down in one go]
Me: Siri, call <my city> Toyota
Siri: I'm sorry, you do not have that contact number.
Me: &$@@&/&&/&!!!