Siri is not talking.
I have Siri enabled. She is responding to what I ask, but she is not talking.
iPhone 13 Pro Max, iOS 15
Retrain Siri with your voice
Go to Settings > Siri & Search, turn off Listen for “Hey Siri,” then turn on Listen for “Hey Siri” again. To change Siri accessibility settings, see Use accessibility features with Siri on iPhone.