Facebook is continuing to improve and expand Face Recognition capabilities. They are promoting awareness and the capability for users to opt out as desired.

https://www.wired.com/story/how-to-turn-off-facebook-face-recognition-features/

More Facebook users started seeing a notification about how the social network uses its facial recognition technology. When Facebook first implemented the tech in 2013, it limited its use to suggesting tags in photos. In December, though, the company announced that it would expand face recognition’s scope to notify you when someone added a photo you were in, whether it was tagged or not. If that sounds like something you’d rather Facebook not do, it’s easy enough to stop.

If you’re not comfortable with Facebook’s new face recognition tools, you can head to Settings > Face Recognition, then select yes or no at the question Do you want Facebook to be able to recognize you in photos and videos? And while Facebook says that it isn’t opting everyone in, you may be surprised to find the feature already on.