Anybody who ever used Google Voice for free VOIP was training it for speech recognition.
Google says Search Services History may include your searches, results you view, AI Mode responses, voice search recordings, Search Live transcripts, Google Lens images, uploaded files and some information tied to your activity..
turning off Save Media does not automatically wipe everything that was already saved .. deleting the original activity may not pull it back.
Never used that, and when I’ve called customer service sites like Spectrum, and others that claim they offer voice recognition for account identification, I’ve refused. I’ve never used Siri on my Apple devices or Alexa on my Kindles. I’ve made sure to turn those apps off whenever I’ve purchased a replacement device.