For adults, Sensitive Content Warnings are opt-in and disabled by default
This image classification, which does not currently apply to videos, works on-device and is powered by Android System SafetyCore, which “doesn’t send identifiable data or any of the classified content or results to Google servers.”
I imagine to do this they’ll be uploading and scanning all of your text messages.
Edit: I was wrong! They say they won’t.
Why imagine when you can just read the article?
That’s good to know. I don’t believe them, but at least they have not gone full-out with it.