Mae Anderson, AP:

Apple is giving consumers notice when installing the update, iOS 13.2. Individuals can choose “Not Now” to decline audio storage and review. Users who enable this can turn it off later in the settings. Apple also specifies that Siri data is not associated with a user’s Apple ID.

One of the little publicized changes that came with iOS 13.2. Most likely because the HomePod change and bricking monopolized the news.

Personally, I opted in. Comes down to trust. I trust Apple with my privacy.