How do I change Siri’s response when I say “hey Siri“?

Easiest: State your request immediately. Don’t wait for Siri feedback. If you’ve met the “uh-huh”, you’re waiting.

What you’re seeking: Settings > Apple Intelligence & Siri > Siri Responses > Prefer Spoken Responses

Tommy ~ See what's set here:

Settings > Siri > Siri Responses

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...And Siri's volume is independent of the system volume. To know Siri's current speaking volume, say: "Hey Siri, what's your volume?"

To set Siri's volume: "Hey Siri, speak at 50%." (or other %.) ...Or: "Hey Siri, speak louder / softer."

Or:

Whilst Siri is speaking, press the volume buttons up or down. (If Siri isn't currently speaking, ask Siri to tell you a joke or recite a poem.) Then next time, Siri should speak at the volume you've just set.

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